I am one of the people who reported this problem via the Hub but without any feedback from Microsoft. I believe the Hub is similar to the Microsoft Community forum - we all talk to each other about Microsoft software that doesn't work properly while they
ignore us and concentrate on making money.
However, this afternoon I noticed that the Microsoft Photos app "Import/From a USB device" function "Import items/Items since last import" suddenly works again. Unfortunately, the "Import settings" function still does not include the original
possibility to delete all photographs on the iPhone. So I will continue to use the (non-Microsoft)
Photo & Video Import app (published by Axel Rietschin) which works fine for me.
Best Regards
Perry