Now I keep getting prompted about running out of space but when I check in both About and iPhone Storage I’ve got more than 300gb free. Then I found some recent photos and videos aren’t uploading to iCloud because I’m out of space... Checking my 2tb of iCloud storage shows me with just under 1tb of free space. I did a hard reboot and now my Photos app is showing restoring from iCloud. I’m sure it’ll sync across a bunch of photos now that didn’t before. I was able to submit Feedback in the Feedback app about it, too, but for real.