HOw do you find all the backups on icloud?

Hello,

Locate iOS backups stored in iCloud

If you use iCloud Backup, you won't find a list of your backups on iCloud.com. Here's how to find your iCloud backups on your iOS device, Mac, or PC:

• On your iPhone, iPad, or iPod touch, go to Settings. Scroll down and tap iCloud > Storage > Manage Storage.
  
• On your Mac, go to Apple menu > System Preferences, then click iCloud.
• On your PC, open iCloud for Windows and click Storage.

More info:

Locate backups of your iPhone, iPad, and iPod touch - Apple Support

Also note that iCloud is an incremental backup system. So there is only one backup file per device. That file gets updated every time your device backs up, but there is no archive kept of the previous backup.