Why it doesn’t matter: All we know is what yappy witnesses tell reporters they were asked about.
News flash: Mueller is looking at everything.
That’s his job. When he was named, he was empowered/instructed to look into the “FBI investigation of Russian government efforts to influence the 2016 presidential election and related matters.” That there is a broad mandate.
This gives us literally zero insight into what the special counsel is actually doing and thinking.