Well, I don't have this key working in AntiX either. So either it's a hardware issue (feels unlikely, this button was JUST working earlier today), or it's some fucked layout choice at the NVRAM or rEFInd level, which I expect to be very fun to diagnose.
So, while I don't intend to main any Linux in 2026 (AntiX is just the best option, for when you need a Linux for something), I think I'll stay here a little while, tweak the system, and get set up for development. I already have a couple #Moonshine fixes to publish, having got that working again already.