Can not delete Backup in iCloud

Thank you for the screenshot.

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No Delete Button for iCloud Backups:

If you don't see a delete button for your iCloud backups, ensure that you are not trying to delete a backup while the loading icon is still spinning. You may need to turn off the backup first, then wait for the loading to finish before attempting to delete it again.

Source: deleting icloud backups no delete button

"Can not delete Backup in iCloud: Can not delete Backup in iCloud,"

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Deleting a Backup from iCloud:

What backup are you looking to delete from iCloud? I assume a backup of your iPhone? If so, try the following...

Use a Computer:

Have a computer at hand? If so, use this link to delete the backup: View and manage iCloud Device Backups - Apple Support