Hello, Yubico Authenticator maintainer here. Please file a github issue for the Wayland problem and we'll see what we can do. https://github.com/Yubico/yubioath-desktop
Yes, will do :) I'm afraid the QR code one is gonna be tricky, because of the way Wayland works. but the C/P issue is probably something with Qt + GTK3 that are confusing eachother