More information - OpenFreebuds
This desktop environment didn't support tray indicators and applets out-of-box. So, to use OpenFreebuds, you must install extension AppIndicator and KStatusNotifierItem Support.
The built-in keyboard shortcut feature will not work under Wayland, and there is currently no way to solve this problem. The reason for this the protocol itself.
Therefore, you can assign keyboard shortcuts through the system settings.
To do this, open Settings ->
Keyboard -> Keyboard Shortcuts ->
Additional keyboard shortcuts. Add a new keyboard shortcut,
with an arbitrary name. In the "Command" field, enter
action can be
next_mode- next ANC mode
mode_0- disable ANC
mode_1- enable ANC
mode_2- enable awareness ANC mode
connect- connect device
disconnect- disconnect device
For example, this is how my
Ctrl-Alt-Q keyboard shortcut setting looks like
to switch noise reduction modes: