Flagging an email.

As someone pointed out in November 2021, with Monterey flags no longer appear in the list in the mailbox where they caught the eye and were a real reminder. They are now useless because you have to have thought of them already and open the flagged mailbox, or open every email to see if it's flagged.

Why did Apple get rid of such a useful tool? In fact my update to Monterey has been a real pain - when an update which irons out all the glitches?