RR's memo was heavily redacted, so to say that Trump was not part of it is unclear. However, I suspect that any authority, in regards to Trump, is limited to the collusion narrative and any associated campaign/election issues. He was clearly never given carte blanche to look at Trump's entire life/business empire, which makes sense as that was never the reason for having a special prosecutor.
I agree with you, that the primary focus is not Trump (if it ever was.)