Photos not uploading to iCloud
I'm migrating to a new M1 Mac. I don't have enough space on the internal SSD for all my family photos so I've moved them to an external drive. That all works great so far. I'd like to move them all into iCloud too but it seems like only a selection (maybe those taken on my iPhone?) are in iCloud. How can I get the entire local Photos library backed up onto iCloud. I have the external drive library set as my system library. I have turned on iCloud Photos both in System Preferences, and Photos Preferences.