Can I attach a certificate to a learner within an existing legacy course in learn?

Summary:

Hi, I am attaching learners older certificates to individuals within their courses content.

As legacy courses are not active and not viewable (as to go into them), is there a way to attach a doc to these learners legacy courses?

Content (please ensure you mask any confidential information):

Looking for this page within the Legacy learners courses if available.

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

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