Running MacBook Air [M1, Sonoma 14.5, gmail account]. Had dozens of flagged emails, suddenly a few days ago, most disappeared, leaving only about 30, I cannot located the lost flagged emails, it appears they are gone completely. Have restarted mac, selected many mailboxes flagged and otherwise and rebuilt them, no change. Logged into gmail via browser, cannot find those old flagged emails. What happened? Is there anyway to recover them? Computer is backing up to BackBlaze regularly, but I do not know where, if at all, emails are stored on the Mac, so cannot go back to recover them. Any help appreciated.