Hello,

I trust you are well.

Is there a setting that allows the admin to approve ads when submitted by a seller?
Is it also possible for the seller to get an email when they post an ad? i.e the same way an admin receives a posted ad by a seller?

Kind Regards

There is item validation plugin that can handle this.
https://osclasspoint.com/osclass-plugins/protection-and-spam/item-validation-plugin-i60#detail