Binding NumPad arrows on MacOS with Karabiner

I created the following key bindings in Karabiner:

Its settings are in ~/.config/karabiner/karabiner.json:

{
    "global": {
        "check_for_updates_on_startup": true,
        "show_in_menu_bar": true,
        "show_profile_name_in_menu_bar": false
    },
    "profiles": [
        {
            "complex_modifications": {
                "parameters": {
                    "basic.simultaneous_threshold_milliseconds": 50,
                    "basic.to_delayed_action_delay_milliseconds": 500,
                    "basic.to_if_alone_timeout_milliseconds": 1000,
                    "basic.to_if_held_down_threshold_milliseconds": 500,
                    "mouse_motion_to_scroll.speed": 100
                },
                "rules": []
            },
            "devices": [
                {
                    "disable_built_in_keyboard_if_exists": false,
                    "fn_function_keys": [],
                    "identifiers": {
                        "is_keyboard": false,
                        "is_pointing_device": true,
                        "product_id": 2982,
                        "vendor_id": 10077
                    },
                    "ignore": false,
                    "manipulate_caps_lock_led": false,
                    "simple_modifications": []
                },
                {
                    "disable_built_in_keyboard_if_exists": false,
                    "fn_function_keys": [],
                    "identifiers": {
                        "is_keyboard": true,
                        "is_pointing_device": false,
                        "product_id": 11555,
                        "vendor_id": 6700
                    },
                    "ignore": false,
                    "manipulate_caps_lock_led": true,
                    "simple_modifications": []
                }
            ],
            "fn_function_keys": [
                {
                    "from": {
                        "key_code": "f1"
                    },
                    "to": {
                        "consumer_key_code": "display_brightness_decrement"
                    }
                },
                {
                    "from": {
                        "key_code": "f2"
                    },
                    "to": {
                        "consumer_key_code": "display_brightness_increment"
                    }
                },
                {
                    "from": {
                        "key_code": "f3"
                    },
                    "to": {
                        "key_code": "mission_control"
                    }
                },
                {
                    "from": {
                        "key_code": "f4"
                    },
                    "to": {
                        "key_code": "launchpad"
                    }
                },
                {
                    "from": {
                        "key_code": "f5"
                    },
                    "to": {
                        "key_code": "illumination_decrement"
                    }
                },
                {
                    "from": {
                        "key_code": "f6"
                    },
                    "to": {
                        "key_code": "illumination_increment"
                    }
                },
                {
                    "from": {
                        "key_code": "f7"
                    },
                    "to": {
                        "consumer_key_code": "rewind"
                    }
                },
                {
                    "from": {
                        "key_code": "f8"
                    },
                    "to": {
                        "consumer_key_code": "play_or_pause"
                    }
                },
                {
                    "from": {
                        "key_code": "f9"
                    },
                    "to": {
                        "consumer_key_code": "fastforward"
                    }
                },
                {
                    "from": {
                        "key_code": "f10"
                    },
                    "to": {
                        "consumer_key_code": "mute"
                    }
                },
                {
                    "from": {
                        "key_code": "f11"
                    },
                    "to": {
                        "consumer_key_code": "volume_decrement"
                    }
                },
                {
                    "from": {
                        "key_code": "f12"
                    },
                    "to": {
                        "consumer_key_code": "volume_increment"
                    }
                }
            ],
            "name": "Default profile",
            "parameters": {
                "delay_milliseconds_before_open_device": 1000
            },
            "selected": true,
            "simple_modifications": [
                {
                    "from": {
                        "key_code": "keypad_4"
                    },
                    "to": {
                        "key_code": "left_arrow"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_6"
                    },
                    "to": {
                        "key_code": "right_arrow"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_8"
                    },
                    "to": {
                        "key_code": "up_arrow"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_2"
                    },
                    "to": {
                        "key_code": "down_arrow"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_7"
                    },
                    "to": {
                        "key_code": "home"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_1"
                    },
                    "to": {
                        "key_code": "end"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_9"
                    },
                    "to": {
                        "key_code": "page_up"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_3"
                    },
                    "to": {
                        "key_code": "page_down"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_period"
                    },
                    "to": {
                        "key_code": "delete_forward"
                    }
                },
                {
                    "from": {
                        "key_code": "keypad_0"
                    },
                    "to": {
                        "key_code": "insert"
                    }
                }
            ],
            "virtual_hid_keyboard": {
                "country_code": 0,
                "mouse_key_xy_scale": 100
            }
        }
    ]
}

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