HomeKit only provides motion detection, camera, and doorbell functionality. Theoretically, you could then use LLM Vision or similar software in Home Assistant to recognize objects, people, or animals in the camera image. However, the connection via HomeKit is exclusive, and you would have to disconnect from Apple Home in order to use it with HomeKit Device Integration in HA.
Since the G410 acts as both a Matter bridge and a controller, you don’t need a USB dongle. All you need to do is install the Matter Server add-on, then add the G410 using the HA smartphone app. Please don’t hesitate to ask if you need further assistance.
By the way: Zigbee and Matter are not related.
Here is a reading recommendation: Matter & Thread: A Guide Through the Jungle