icloud doesn't give me the option to turn on apple mail for syncing
I want my wife's MacBook Pro and her iPhone 13 Pro to sync email. When I go to iCloud the Mail app is not shown on her phone so I can turn it on. Other apps are shown, i.e. Photos, iCloud Backup, but no Mail.
How do I get Mail on the list so I can turn on iCloud sync?
iPhone 13 Pro, iOS 15