It will not pair with any sensor, not the trainer, not a polar heart band either.
Tried with Zwift companion on the same phone to no avail.
Gave up.
(Zwift on my Windows 10 Pc ran alrighat 27th January 2022, and not anymore as of today, Jan 31st. Had to reinstall. Shows the same failure: not connecting anymore to my trainer, nor to the polar heart band. I’ll post this somehwere else too).
So, sadly, since todat Zwift has become completely useless for me.