Where online can I look at what is backed up on IiPhone?

RLothbrok wrote:

I log into iCloud and there's no backup there to look thru. I pay for extra storage and I know it's backed up, but where can I actually see what is backed up (pictures, messages, etc? Thank you

You can only view what you've synced to the icloud not what you backed up, read here What does iCloud back up? - Apple Support

iCloud+ has 2 independent functions. iCloud backups, and iCloud sync. It’s confusing because they both have the same name prefix. But they have no connection with each other. Go to Settings/[your name]/iCloud. You will see a bunch of switches (with iOS 16 also tap Show All). When you turn on a switch that data type will sync to iCloud. If you do this on multiple devices that share an Apple ID the selected data will sync to all of those devices. 

You can also turn on iCloud Backups. This will back up your phone every night if the phone is plugged in, connected to Wi-Fi and locked.

But note that anything that you sync by the first method will be excluded from the iCloud backups.

You can see what is included in a backup by going to Settings/[your name]/iCloud/Backup and tap on the name of your phone. This will list all of the app data included in the backup.