Note, that the Reform does not run Windows, so to run Windows games, you need to run them via Wine or Proton if you are using Steam. Unfortunately, PUBG does not seem to work well with Proton: https://www.protondb.com/app/578080
Furthermore, the Reform is not an x86 (Intel) platform but an ARM notebook. Most commercial PC games are developed for x86 and not form ARM, so you have to go through an emulator like box64.
Also please remember, that other than @minute nobody has the rk3588 in their Reform yet. But this is being worked on and should be ready soon: minute: "i just shot some pictures for the RCORE RK3588 mo…" - Mastodon
All of that being said, taking into account that many games are not made for Linux and many games are not made for ARM, gaming is still very much possible. Have a look at this thread: MNT Reform Gaming Thread
The performance of the RK3588 should blow the A311D out of the water, so the things that work on my laptop should work much better on the RK3588. For example, as Lukas already said, I played over 40 hours of networked multiplayer in Stardew Valley and we are now going through Mr. Qi’s quests. We just managed to grow 400 Qi beans and find 4 prismatic shards. On low graphics settings, I can even play Torchlight 2 on my A311D Reform: josch: "I did not expect that the MNT Reform with Banana …" - FLOSS.social