Here are some troubleshooting steps to help identify why emails aren’t appearing in the Sent folder:

1. Verify that the sent message was not accidentally sent from another device or application.
2. Check if the mail server has identified the sent message as spam.
3. Verify you are sending from the correct email address.
4. Check the recipient email address for typos.
5. Ensure your email mail client is regularly updating the Sent folder.
6. Check your settings to enable server-side deleted email recovery.