MacBook Photos app doesn’t recognize connected iPhone
I have manually downloaded iPhone pics to MacBook for YEARS, using variety of phones and MacBooks. But now, my MacBook Photos app does not show my iPhone in the sidebar when trying to import photos. I have used the indentical devices to do this many times, and I know how to use the Photos app. I have restarted both devices. I have tried a different USB-to-Lightning jack cable. Same result. iPhone shows in the sidebar of a Finder window, but NOT in the Photos app when I try to import photos from my phone.
Both devices are charged and software is up to date (iPhone 12 Pro Max running iOS17.4.1; MacBook Air M1 2020 running Sonoma 14.4.1). I have looked at similar questions on Apple Communities, and most answers direct users to Transfer photos and videos from your iPhone or iPad to your Mac or PC - Apple Support. I am unable to go past step 3 or 4 on the instructions there since my iPhone doesn't show in the Photos sidebar for importing. I have toggled iCloud sync “off” on both devices. I am not being asked by either device to trust the the other device.
What am I missing?
MacBook Air (M1, 2020)