iMazing is the grownups’ version of iPhone management, making Apple’s enterprise utilities available to end users in an attractive GUI.
Notifications started after upgrade to iOS 15. Finding a solution which works has been difficult enough I’m posting it publicly to help others.
There’s a quick way to track down to errant audio beeps/bings/gongs via terminal, using the “lsof” command.
iPad and iPhone users should be very wary of upgrading to iOS 13.5. There’s no path backwards: it will track and trace you in entirely new ways.