Do you have a source on the GPL violations? I went looking as I suspected as such but i only got as far as https://linmob.net/2021/01/31/linbits30-weekly-linux-phone-n... there's a single mention of it and the linked tweet has been deleted.

If they don't release the source and the custom drivers and patches they use to power the device then they'll probably be in violation of GPL but I'm not sure of the specifics tbh. I do agree that something like this will definitely help the development of touch screen devices on Linux.