This is a magnetic wall mount which should fit every tablet regardless of its dimensions.
Remix of another tablet holder to make it more easily printable without support. Also offers a better fit of the magnets.

For the magnetic holders, you need these things:
https://www.amazon.de/gp/product/B07411ZXHM/ref=as_li_tl?ie=UTF8&camp=1638&creative=6742&creativeASIN=B07411ZXHM&linkCode=as2&tag=522-21&linkId=e5db8da2b7a1e04c93856ece2d2e1dd9

After printing the tablet holder, remove the seal of the double-sided adhesive tape on the backside of the two magnets and push them into the intended holes.

Then do the same for the metal plates which are delivered with the two magnets (remove seal of adhesive tape and tape them to the backside of your tablet)