Copy mails from iPhone to iPad
How do I transfer my gmails from my phone to my IPAd and keep them on my phone as well?
[Re-Titled by Moderator]
iPhone XS, iOS 16
Assuming that you are using the native Mail App, simply add your Gmail account to your iPad:
Add an email account to your iPhone, iPad, or iPod touch - Apple Support
All of your Goole Mail is stored on Google’s Mail servers. A copy of your mail is downloaded to each of your devices.