My iPhone 13 and my iPad have been hacked therefore I need my emails encrypted

Your iPhone and iPad have not been hacked.

Your Apple ID may have been hacked, especially if it had a weak password and did not have 2 factor authentication. If that is a possibility see→If you think your Apple ID has been compromised - Apple Support

iPhones and iPads are not easily hacked. What makes you think yours has been hacked.? It is much more likely that your Apple ID has been compromised or your passwords are known to by someone. Check this link...

If you think your Apple ID has been compromised - Apple Support

And this one...

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Your phone was not hacked. The FBI can’t hack your phone, can your neighbors do something the FBI can’t?