On fedora 43, installed via flatpak, and running under wayland, button preses are mapped properly-ish in the input diagnostics, but are labeled improperly. As the control mapper doesn't allow mapping 'unlabeled' buttons, I can't use that as a workaround.
Hat maps correctly
A and B map correctly
X => Y
Y => LB
LB => Back
RB => Start
Back => Guide
Menu => (unmapped; b11)
Guide => (unmapped; b12)