Could you elaborate on why realtek was chosen for the ethernet expansion card? It does tend to have a pretty bad rep, with one of the recent documentations being https://overengineer.dev/blog/2021/04/25/usb-c-hub-madness.h...
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It's part of a powered USB hub, and it works fine while the tablet is connected, but after disconnecting the tablet, the ethernet controller stays active, and about half an hour later my entire home network stops working. I had to disconnect the realtek adapter and reboot my network switch each time.
So, their problems are not entirely limited to mac.
Also, here's a better link for that: https://www.reddit.com/r/UsbCHardware/comments/qo6r3f/powere...