For me it works, it took some tinkering (changing the video device). I can unlock my v3 after boot with my face.

You can use windows hello in linux, its called "howdy" even works with sudo in terminal. Check this out: https://github.com/mudkipme/awesome-minisforum-v3?tab=readme-ov-file#faical-recognition

I bought mine here, with german keyboard layout https://minisforumpc.eu/products/minisforum-v3-se-3-in-1-tablet-mit-magnetischer-tastatur Its the slower one maybe the faster comes back idk, i got the r7 8xxx from there in april Took two month to arrive

Sure, especially if paired with the extensions mentioned here: https://www.reddit.com/r/gnome/comments/12xo5m6/gnome_on_a_tablet/ Some are outdated but there are alternatives for current gnome versions.

I had two x86 tablets with linux, both with issues. Prev. owned a dell latitude 5285 and now a minisforum v3. The latitude maybe available for ~200 in secomd hand market but its quite old i5 7th gen is pretty slow today

Both had issues with volume buttons in linux, on the dell it worked when using x11 instead of wayland and for minisforum it was a simple change in config files.