That's interesting 🤔 I have it on my S22ultra and can back up to the cloud. My version was downloaded from the Galaxy Store and it was updated just last month. I see yours is from the Google play store, that could well be the problem as Google has some apps which shows aren't compatible on some devices.
Go into settings > security and privacy > updates. Make sure Google play system update is on the latest. Also double check you have latest software up to date.