I have to assume the answer is ‘yes.’
We know from early on in Letitia James’ case against Trump that the matter had ‘also been referred to the IRS and to the US Attorney’s Office, Southern District of New York, for further investigation.’
To the extent the undervaluation concerned federal income (including Gift) tax, it seems like it’s precisely in the IRS wheelhouse. But you’d have to wonder if NY State (and others?) mightn’t have similar issues (state income tax) with his behavior under the same sets of facts.
I have neither seen nor looked for any further stories on this*, but have to wonder – based solely on that NYT story – what’s still viable under the Statutes of Limitations.
I haven’t looked into exactly what the SDNY USAG could charge him with, specifically, and just how much help Engoron’s ruling – if upheld on appeal – would be, but …
* But here’s one: