If something was sent to the trash it will be in the trash folder or mailbox for the mail account it was sent to form which it was deleted.
What device or computer are you doing this on? You posted in the "Earlier Operating Systems" forum which is for older Macs, but your device line says you have an iPhone 14. To get specific instructions you need to tell us what device you are doing this on and what OS it is running.
On an iPhone tap on the < icon at the top left corner until you see all the mailboxes, then scroll down to the Trahs mailbox for the account the email was deleted from.
click here ➜ Delete and recover emails in Mail on iPhone - Apple Support
