With my iPhone 15 Pro, the system sounds, like alerts when I receive an iMessage or send an email is very loud. I have the Ringtone and Alerts volume set to very low as you can see in this screenshot, but it doesn’t seem to have any effect. Is anyone else having this problem?
I fixed the problem by turning on the “Change with Buttons” toggle. When that is on, the volume I set is respected. When it is off, the volume is always at the maximum.