After updating to 21.19 (Epix Pro G2 Sapphire), the breathing variations feature appeared and worked as expected. But due to sound/volume issues, Garmin support advised me to reinstall the software. I followed the instructions, but now the breathing variations feature is gone—both on the watch and in the app. I tried restarting the device, but it didn’t help. I don’t know what else might be missing or malfunctioning, since I can’t test everything at once. It’s frustrating.