ITunes is not backing up to iCloud.
I plugged my iPhone 6s+ iOS 15.7 to a PC and chose to back up to iCloud but it backs up to "my computer".
Then I chose to back up to "my computer" and, of course, it backs up to "my computer".
Then I chose to back up to iCloud again but again it backs up to "my computer".
It always backs up to my computer.
What is wrong?
iPhone 6s Plus, iOS 15