Thanks guys ,I have used Remote Desktop, best praise I can give it is that it works.
and I'll try reinstalling that version from apkpure
Oddly in my wasted time of attempting to fix what once worked I discovered the soundbar I have hooked up to my pc that I use when not using dac/amp or dac/headphones is that the paired soundbars remote control controls muscibee, even when the audio is routed through my usb connected dac (to amp or headphones)
Its a cheap SHARP soundbar i was given for free, I'd still rather be able to visually pick what I play through musicbee but at least I can change volume, pause/play/ fwd/rewind etc whilst not sat at my pc. (I use Volume 2 (squared) to route audio for different apps to different outs, unsure if that plays into the ability to bypass the soundbar yet still use the the remote control aspect.)
ps the soundbars remote does work with other audio players FYI