Create privilege and assign menu item to it

Hello everyone,

The creator should only be able to create a vendor/customer and should not delete any vendor which is on hold or approved nor should be able to delete any of the vendor details of approved or on hold vendors.

The approver should only be able to approve or reject the request and should not delete any fields or Vendor/Customer.

How can we achieved this based on user role/privilege.

I have to create new privilege and assign the menu item to it. I need which menu item