Sorry, it is impossible to invest time to search and study all third party controls.
Don’t they follow common requirements for Android keys?
They should have public documentation with their keys and app requirements,
to make life easier for app developers. Then I can see if and what is possible.
(if you know such public documentation, please post it here)
Anyway, next app version will have improved support for external input devices.
We will see if this controller works better with the new app version…