iCloud Photos
I have turned on iCloud for photos. How do I force it to upload my photos? It isn't happening automatically
iPhone XS, iOS 13
See the article Get help with iCloud Photos - Apple Support
If you have Optimize Storage turned on, you might not have all of your original photos and videos on your device. To download the original photos and videos on your iOS device, go to Settings > [your name] > iCloud > Photos and select Download and Keep Originals.