Open the Photos app on your iPhone, iPad, or Mac
Sign in with your Apple ID if prompted
Make sure iCloud Photos is turned on in Settings
On iPhone or iPad, go to Settings > [your name] > iCloud > Photos
Turn on Sync this iPhone or iCloud Photos
On Mac, open Photos > Settings > iCloud
Turn on iCloud Photos
On a web browser, go to iCloud.com
Sign in with your Apple ID
Click Photos
Browse, search, or open albums to view your pictures
On Windows, open the iCloud for Windows app
Sign in with your Apple ID
Turn on Photos
Open File Explorer and select iCloud Photos
Check that you are using the same Apple ID on all devices
Make sure your device is connected to the internet
Wait for photos to finish syncing if they do not appear immediately