Unable to restore app sound on my iPhone 13

My iPhone 13 did a scheduled software update overnight and now I get no video sound on my apps (FB, Instagram, You Tube, etc). I have checked the FB settings and all the sound buttons are in the "on' position. I have also turned the phone off and then back on after 30 seconds, to no avail. The volume button on the left side of the phone is all the way up. The phone itself rings when I get a call. Help!

[Re-Titled by Moderator]