And just to not be that negative about Linux gaming: On actual gaming hardware you can nowadays play almost all games on Linux.
I am writing “almost”, because competitive games that require kernel-level anti-cheat generally do not run on Linux, and also a few other games have issues still.
Linux gaming is working so well, that Valve is selling a gaming handheld running Linux: the Steam Deck.
But yeah, all currently available SoMs for the MNT Reform use an ARM64 CPU, so you will have emulation overhead, and the GPU is generally not what one would consider suitable for gaming…
There is the MNT Reform Gaming Thread, which you can check to get an idea of what kinds of games you can expect to run on the Reform.