Hello everybody

I'm very happy with my N900, and still using it every day (as my main phone and device), even if sometimes it is limited (I think about web browsing right now). I would not change it for anything currently available on the market.
But my girlfriend seems to want a tablet that she could use for her work (mostly showing videos and playing audio files, as well as text files like pdf to her trainees). Right now she uses a "dumb phone" (a Nokia Asha something) that can't do this kind of stuff (apart from the audio playing even if speakers are not that loud). I'll have to mention that she doesn't want a smartphone (she really likes her "dumb phone" and don't want to replace it). As I am the one with the technology in the house I have to look into it.
An iPad is not an option, I don't own any Apple product and don't want to get one. So all is left is an Android device. I don't like Android OS because most of the time it comes with Google software and a lot of manufacturer software too. I prefer a clean up to date OS. I've played a little with Lineage OS, and even if not perfect (or good enough from my point of view), it seems to be the best alternative available.

So now the question :
Is there any available (like in new in the store or online) tablet that has the followings :
- supported by Lineage OS
- screen size of 7 or 8 inches (not more than 8 inches)
- 3G/4G (preferably with 4G, Europe frequencies)
- GPS
- good performance overall

I've looked at the devices page on Lineage OS website but there doesn't seem to be any tablet that I can find new and that has all the above requirements.

Was thinking that maybe someone has and idea about a tablet that isn't on that page yet and meets all the requirements.

PS : I know this is not an Android forum, but for now I am not an Android user (and don't really want to become one), so though I'll ask here first before creating accounts on other forums which are specific to Android.

Thanks for reading this long post and to those who could give me some advice.