iPhone 14 pro not showing sent emails

Hello,

An online search turned up this:

Step 1: Go to Settings>Mail>Accounts. Step 2: Tap on the account that has problems>Tap on the Account option under IMAP. Step 3: Choose Advanced option at the bottom>Under Mailbox Behaviors, tap on Sent Mailbox. Step 4: Ensure to toggle on the button of the folder called Sent under the On the Server section.Feb 8, 2023

Also see:

Change email settings in Mail on iPhone - Apple Support

Good luck.