Mac Mini - Continuity Camera not working (Answered)
With a Mac Mini, If you don't have another wired USB camera, using an iPhone for wireless Continuity Camera operation does not work.
After some troubleshooting, it was found to work solo with a wired (lightning) connection.
Hope this helps.
(Tested on 2020 M1 Mac Mini w/ iPhone 13 Mini via USBA-Lightning cable)
Mac mini, macOS 13.0