I was just on the phone with AppleCare. Apple has removed the ability to backup your iphone to your mac via wifi! You must use a usb cable. I used to backup to my MacBook Pro M5 all the time, but suddenly I was unable. I updated my Mac OS to 26.4.1 still can't backup via wifi! AppleCare's inly suggestion was to complain @ apple.com/feedback i suggest you complain, if enough do they might bring it back. Sheesh!