Hi, I'm John!
Please check your Deleted Items folder and click “Recover items deleted from this folder” at the bottom, sometimes older messages can still be restored from there. Also check your Archive or Junk Email folders. "Recover and restore deleted items in Outlook" https://support.microsoft.com/office/recover-and-restore-deleted-items-in-outlook-49e81f3c-c8f4-4426-a0b9-c0fd751d48ce
If the emails don’t appear under “Recover items deleted from this folder,” it means they’ve been permanently removed from the mailbox and unfortunately can’t be recovered.