Specifically in supertux, the flathub version works fine on wayland but the fedora flatpak gives [FATAL] /builddir/build/BUILD/supertux-0.6.3-build/SuperTux-v0.6.3-Source/src/supertux/main.cpp:672 Unexpected exception: Couldn't initialize SDL: x11 not available
They are both on the same version of 0.6.3