There are two questions here:
- Does System Center technically support running the product on an AG? Since I don't work with that product, I cannot answer that one.
- Would the license for System Center include second machine for a non-readable replica in a Basic AG. My gut feeling is, no. Then again, if you have Software Assurance, it may work out.
However, when it comes to licensing, this is not the place to get authoritative answers - this is a not a technical forum, not a legal one. Please check out the thread https://learn.microsoft.com/en-us/answers/questions/1664731/c-mo-recupero-la-informaci-n-de-licencia-olp-micro to get information how you can get help with license questions.