I have used Ubuntu 20.04 with the Gnome desktop until september, where I changed to the Budgie desktop.
I have a Mac extended danish keyboard.
In Gnome I just did select Danish (Macintosh) as input source in the Region & Language settings, and it has worked flawlessly.
Changing to Budgie, the keyboard stopped working as a danish one.
At the moment I have chosen Cameron Multilingual, so I at least have many of the characters like <>*-+?= proper, however, missing the 3 danish characters.
To day I am using Ubuntu Budgie 20.10. It is running as a virtual machine, and the interface is through a remote desktop.
Since I am fan of the Budgie desktop I am looking forward for a solution …