Kindly note that we do not have the option to link an account with an email on PS4™/PS5®; it is simply absent from the main menu.

We still have a "save to cloud" option in the Help section, but it has nothing to do with account linking.

If you're transferring from PS4™ to PS5® and would like to play with the same profile, you should just make sure you are using the same PSN profile.