after IOS 17 deleted emails not showing in trash

Hey jdip101,

Check to see if you have a specific time set to keep deleted emails in the Trash mailbox on your iPhone. This is typically the reason many deleted emails disappear.

Decide how long to keep deleted emails

With some email clients, you can set how long deleted emails stay in the Trash mailbox.

1. Go to Settings  > Mail, then tap Accounts.

2. Do one of the following:

* If you’re using an iCloud email account: Tap iCloud, tap iCloud again, tap iCloud Mail, then tap Mailbox Behaviors.

* If you’re using another email account: Tap your email account, tap your address, then tap Advanced.

3. Tap Remove, then select a time interval.

Note: Some email services might override your selection; for example, iCloud doesn’t keep deleted emails longer than 30 days, even if you select Never.

Delete and recover emails in Mail on iPhone - Apple Support

Kindest Regards.