My devices are showing up on a seperate Ethernet connection. Also it says many devices are unknown t

Kor1972

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Pixel

The results of the scan will depend on where you are scanning from. Also, routers generally identify devices on different ports and network types that is, Ethernet and Wireless (2 & 5 GB can also appear as a separate network if the SSIDs have been split). That said, all of your devices are on the same network mask (192.168.x.x) so are on the same network which suggests my previous comments are ok.
With smart devices, there are millions, many cannot be identified with any certainty so unfortunately you may need to manually identify them then edit them with the correct information.