Problem solved.
Inside the Template directory, you have to duplicate the file single.php to single-asa2_repo.php.
I’m trying now to solve another problem: how to handle the Repo Categories pages.
In fact, the breadcumbs showed in the repo page related to the product, refer to the categories generated in the Repo.
I’ll let you know if I solve this problem. After this, the Repo items will be fully browsable by the fronted.