I recently bought the TUXEDO InfinityFlex 14 which is a 2-in-1 as you describe. Well, they call it a 3-in-1 because you can fold it in such a way that you can stand it on a table and watch movies on it which is a bit silly to call a 3-in-1.

Anyway! It works very well. TUXEDO OS is bascially Ubuntu but they put the latest KDE Plasma on it which has much improved tablet mode support compared to Plasma 5.27 that Kubuntu 24.04 comes with. I really like it. You can install it on non-TUXEDO laptops too like yours. I mainly use tablet mode to read books or browse websites in a more relaxed pose on the sofa.

There’s a touch keyboard too which works well enough if you need to type a sentence here and there but for anything more than that you would revert to laptop mode.

Matrix server is pretty complicated. You’ll need a reverse proxy, SSL certificates, and preferably a database like Postgresql. Minecraft would be a lot easier.

Either way, a lot of it would involve the command-line anyway, so I would second the SSH suggestion. It’s fairly easy to set up. When installing Ubuntu Server for example it asks you right away if you want to install one.