In the below section for syncing templates, it does not mention anywhere that the extenstion needs to be .erb for the import of templates to work. It needs to be added.
Some line stating that the template should have name like my_template.erb.

https://docs.redhat.com/en/documentation/red_hat_satellite/6.15/html/managing_hosts/synchronizing_templates_repositories_managing-hosts

This needs to be updated for all supported version 6.15,6.16,6.17