Using New Outlook on Windows for personal email, calendar, and contact management
Hi! My name is Aj and Im an Independent Advisor here to help! For deleted emails you can check this link for guide https://support.microsoft.com/en-us/office/recover-and-restore-deleted-items-in-outlook-49e81f3c-c8f4-4426-a0b9-c0fd751d48ce
Here you can check if the email is moved to other folder like Deleted, Junk, Archive or Other tab and how to recover them.
Just note that recovery will be available only for deleted emails within the 30 days period. If its more than 30 days then it is permanently deleted.