Photos not backed up to iCloud even though I have space My iPhone 11 says that 577 of my photos have not been uploaded to iCloud because there is not enough space.
However when I go to Settings &gt; iCloud it says that I have only used 35.6 of 50 GB of the storage.
All of my other 1000 photos have uploaded but I don’t know why these are not.
If your iPhone storage itself is full, it can stop the ability to upload to iCloud.

Are your other devices able to upload new photos?
Sign in-and-out of iCloud?
Reboot the phone?
Double check your wifi connection or enable uploading over cellular?

Source: MacWorld