My iCloud did not backup

Your iCloud is your backup, what exactly are you trying to accomplish?

Back up iPhone using iCloud

1. Go to Settings > [your name] > iCloud > iCloud Backup.
2. Turn on iCloud Backup.
3. iCloud automatically backs up your iPhone daily when iPhone is connected to power, locked, and connected to Wi-Fi.
4. Note: On models that support 5G, your carrier may give you the option to back up iPhone using your cellular network. Go to Settings > [your name] > iCloud > iCloud Backup, the turn on or off Backup Over Cellular.