In Mac version, I can do this, but not on Android. (Free version)
Sennheiser Momentum 2 True Wireless Earbuds (with microphones) appears in list, but cannot be selected. Selection returns to Default Sound In.
This is under Audio Options > Recording options > Track 1 > Recording device.
Also cannot change from MONO to STEREO here.
But Audio PLAYBACK device IS selected automatically as "MOMENTUM TW 2 bluetooth"
Device is paired and can playback OK.
Thanks