Updates that change the .exe will always cause incompatibility with F4SE mods until F4SE can release a .dll update. Usually happens pretty fast though.
Keep in mind that Steam Deck compatibility/verification is a lot more than just performance. It also entails controller support, UI/UX scaling and compatibility, and functionality, like being able to pause when the steam deck goes to sleep.
Tencent only owns 20% of Discord's shares, hardly a controlling amount. If you really don't want to give a dime to Tencent (and I certainly don't), you'll pretty much have to stop using the internet or playing video games.