It's possible to create an aditional line in a purchase order for giften item in automatic?

Summary:

We required to add a line of an item automatically, establishing a rule for it. Example: If we buy 10 pieces from the supplier, he will give me 1 extra as a gift for the purchase,

Is there a way to add that gift item?

Content (required):

That a gift item can be added automatically

Version (include the version you are using, if applicable):

23B (11.13.23.04.0)

Code Snippet (add any code snippets that support your topic, if applicable):