Enable gmail imap to new iPhone mail application
New phone, can’t get gmail emails to appear in Apple mail account
iPhone 16, iOS 18
https://guidebooks.google.com/iphone/setup/how-to-sign-in-to-google-account-iphone
If you continue to have problems, post back with details as to where things are going wrong, including error messages if any, and someone may be able to offer assistance. Or contact Gmail support.
Regards.