Unsend email with Undo Send in Mail on Apple Vision Pro
With the Mail app, you can unsend an email. You can also set a delay for all emails to give yourself a little more time to unsend them.
Undo a sent email
Tap Undo Send at the bottom of the window to pull back the email.
You have 10 seconds to change your mind after you send an email.

Delay sending emails
You can give yourself a little more time to change your mind and unsend emails by setting a delay.
Go to Settings