When iPhone 12 rings the volume is lowering automatically

Hi patsy89,

We understand you're trying to adjust your ringtone volume. We're happy to help.

To change your ringtone volume go to Settings > Sounds & Haptics, then adjust the volume slider to the level you want it at. To lock in the volume so it doesn't get changed with the buttons, make sure to turn off the Change With Buttons option if it's currently on.

Adjust the volume on iPhone

To prevent the ringtone volume from automatically reducing while you're using the device go to Settings > Face ID & Passcode, and turn off the Attention Awareness Features option.

About Attention Aware features on your iPhone X or iPad Pro

We hope this helps. Take care!

The answer is in the post right above yours, but to summarize, that is a featured called Attention Aware. If it is turned on when the phone recognizes your face it lowers the volume to avoid annoying anyone nearby. If you don’t want it to do this you can turn off Attention Aware.

I’m trying to find out why the ring volume on my iPhone gets lowered with out my intervention