I’m having an issue with an iPhone 14 with the iOS 26 update not making any notification sounds at all. I’ve don’t all the trouble shooting I know. Checking for silent mode, making sure all focuses are turned of and making sure the volume is up. I’m really at a loss over this. I’m trying to get my wife switched over to an iPhone and gave her my 14 when I got a 17 this past weekend. If she misses to many more notifications she’s going to switch back. I can’t blame her, I had the same problem with that phone for the past year, I just trained myself to check for missed notifications once an hour or so. That won’t work for her.
If they did not work for you, and you wiped the phone for her and it still is not working, I would suggest a trip to an Apple Store.

