How do I see my pictures from a device on my list

If you're using iCloud Photos, your photos will be there.

Set up and use iCloud Photos - Apple Support

Access and view iCloud Photos on your iPhone, iPad, or iPod touch - Apple Support

Phots are not stored by device, but by Apple ID/iCloud Account.

If multiple devices were using the same iCloud account, they will be available.

Were you signed in to each device with the same iCloud account?