How to create a [Buy One Get One] promotion for two or more gifts

Summary:

It does not show me in the cart the gifts of the active promotion

Content (required):

I am creating a promotion from OCC admin to give three items for the purchase of one, but the free items are not activated when adding the conditional product to the cart.

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

21.3.4

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