Photos are not syncing
My iPhone X and iMac have recently stopped syncing photos. They're both running the most recent software. I have iCloud photos turned on on the iPhone. However I do not want to use my iCloud storage for photos. I do not have a photo stream option on the iPhone. On the iMac the Photos app the photo stream does not show any new photos from my iPhone. Any help would be appreciated. Thank you
iMac 21.5″ 4K, macOS 12.1