We recently released Ardour 9.8 with a major new feature: initial support for keys and scales. Ardour can now visualize out-of-scale notes and let you choose whether you want to avoid creating them entirely when you compose and improvise in a specific musical key. See here for more info:
„You should test XWayland and/or use matched monitors. We’re not going to do a lot of work to address this sort of situation with a platform-specific solution.“
So I have to try that since my distro (not Fedora) uses Wayland by default.