Right now we explicitly ship an insecure and dangerous copy of libfuse. When that’s dropped appimages will stop working and the only fix would be to either create a distrobox with that library to run appimages through, putting yourself at risk, or layering that library, putting yourself at risk.
It’ll be something we explicitly don’t support going forward. Bazzite will be the last to make this change because there are so many steam deck related tools that ship as appimages only at this time.