Can Admin Tools Query Users That Have ArcGIS Pro Licenses Attached to Their Accounts?

No. The licensing of products such as ArcGIS Pro uses a separate, not officially public, API that Admin Tools cannot readily to tap into. This is because licensing information is not part of the "User" end point or the standard available REST API, which is how Admin Tools normally interacts with the user object.

Link: "User" endpoint for ESRI's REST API