I use a Garmin HR monitor and A smart elite turbo trainer together when using the PC version of swift… when using the Android version it recognises my turbo trainer but not my HR monitor
If your Garmin HRM is ANT+ only you need to update to the latest Android version as well as an ANT+ dongle if your phone doesn’t have built-in ANT+.
That’s not my issue. I have latest versions and my HRM is ant+ and BT
Is anything else possibly connecting to your HRM via BTLE? Most BTLE devices can only connect to one device and, once connected, can’t even be seen by other devices.
Same here on a Note 8. If I open Wahoo Fitness and get the Garmin HR to connect and then switch to Zwift, it seems to work for me.