Hey there! Nice to meet you!
Unfortunately, if you can't find your deleted emails under both folders "Deleted items folder" and "Recoverable Items folder/Recover items deleted from this folder.", I'm afraid this means that your emails are permanently deleted from the server, and they can no longer be recovered.
You may also check this link for reference: https://support.microsoft.com/office/recover-and-restore-deleted-items-in-outlook-49e81f3c-c8f4-4426-a0b9-c0fd751d48ce#picktab=web
Thank you for your understanding.
Best regards,
Darhyl