Managing personal Outlook.com account settings, security, and privacy
Hello, I’m Virginia.
First I would scan your pc for malware using Defender as well as MalwareBytes & AdwCleaner, once clean then move on to trying to recover emails.
It may not be possible but I’ll give you some suggestions:
https://support.microsoft.com/en-us/outlook/mail/recover-and-restore-deleted-items-in-outlook
As a last resort in order to see if the emails can be restored you’ll need to contact support:
Follow the instructions from the marked answer.