Answer
You can’t delete an AppleID ever, so that still exists. Your Apple ID does not have to be your current or even a valid email address – you can change the primary email via the web site.
How to Remove Apple ID From iPhone without Password
Remove iCloud Apple ID from iPhone without password iOS 10+
How do I delete an iCloud account that no longer exists?
You can’t delete an AppleID ever, so that still exists. Your Apple ID does not have to be your current or even a valid email address – you can change the primary email via the web site.