Comment 3 for bug 1981629

It's not calibre thats incompatible, it's Qt.

There is no Wayland specific code in calibre. calibre uses Qt. The same
Qt code that works on X11, Windows and macOS fails on Wayland. Indeed,
for the next calibre release I will default Qt to using the X11 backend
even on Wayland unless the user expressly sets QT_QPA_PLATFORM. Life is
too precious to waste on Wayland.

Let me repeat my general recommendation. Avoid Wayland like the plague
that it is. Maybe when the Year of the Linux Desktop finally arrives,
Wayland will be ready for general use. Until then stick to X.