Hi @Anonymous,
Actually, if you do not configure the requestor of Approval, the requestor will be set as the Approval connection owner.
But if you append an email address into the requestor, the email will be created by you, but the requestor will the email address owner. If you want to change the vacation requestor as others, you could refer to the following screenshots:

Best Regards,
Community Support Team _ Lin Tu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.