iTunes suddenly doesn't see my iPhone

As of 2 days ago, my iTunes (12.13.4.4) on Win10 (Pro 64bit) fails to recognise my iPhone 7 (iOS 15.8.3). It's always been unreliable recognising it over WiFi, which is annoying, but now it fails to recognise it even connected by USB, which is a deal breaker for me since I've always manually managed my content as Apple isn't transparent about how it would do it, and I want to organise my content MY way.

Windows Explorer can still see my iPhone and the photos on it, so my sync cable and lightning port seem to be fine. I'm not aware of any Microsoft or Apple updates since it last worked a few days ago, and the problem has persisted over rebooting.

Can anyone throw any light on this? Silent iTunes update?