iPhone no longer appears in sidebar for syncing purposes

My iPhone 15 Pro (incl periferals) no longer appears in the sidebar for syncing purposes. I've tried different ports/cables. I've also tried different USB buses, and have connected directly to the MAC mini. I've tried adjusting the > at the top of the sidebar with no effect.

M1 MACmini/2020 running macOS Sequola 15.5.

iPhone 15 Pro with iOS 18.5.