tl;dr: FUTO has given Curtis Yarvin a platform to speak publicly on multiple occasions.

Thank you for answering and I’m thrilled you got it working. Sounds like a bug report to Heroic.

I’m sorry that I don’t have a fix for your problem, probably some weird difference in installed libraries between OpenSUSE and valve’s custom arch distro, but I have to ask: why run OpenSUSE on a steam deck in the first place?