deleted email

Hey everyone - Apologies if this has been discussed. A family member asked me for help, as her emails from 2016 to present suddenly disappeared in the Mail app Inbox on her iPhone 6s as well has her old iPad Air. The emails (from Gmail) are still visible in the Gmail app as well as on her iMac...

Absolutely panicking and freaking out right now. My iPhone X deleted 100s of thousands of emails from my accounts and they cannot be restored. I set it up from an iCloud Backup and it did NOT retain my email settings like it should so it was set to delete Trash emails after a week even though on...