Emails missing after upgrading to Monterey

They might still be there but is not appearing .

Suggest reading from the supplied Link below

Use favorite mailboxes in Mail on Mac

I am having the same exact problem and the favourite mailbox solution is not helping. I have no idea which all of the emails that I am missing, but I only discovered this right after upgrading and trying to locate two specific (random) emails from people I communicate with the most. Still on my phone (and I assume in iCloud) but gone from my MacBookAir.

Following this. I too am missing emails, far more that 2 years. I'm showing a couple emails from '20, '19, then drop down to '17. These are emails I absolutely need! They are NOT still on my iPhone either. WTH???? I already use the "favorites" and have all my accounts under that.

I had same problem... was on phone with Apple support for over an hour and was 'upgraded' to high level support, if I wanted to do this, which was going to involve significant time and commitment with no guarantee it would work. I gave up. :-\. But, if really important to you to recover the lost emails, may try this.

You are welcome and thank you too.

Do come back to the Apple Support Communities ( ASC )  in the future, if / or when additional question may arise

I just updated and am missing 2 years of emails on my MacBook Pro. everything is on phone. Favorites thing doesn't seem to work.

This seems very random!

Any thoughts?

I'm having the same issue - is there some setting i have wrong?

I am having the same issue. Missing 2 years of email under the search function after the IOS Monterey upgrade. Any new ideas? Favourites technique not working.

Log into www.icloud.com and Mail to verify if they are still there