You're right, I'm wrong, sorry, I was checking my memory on Wikipedia [1] which opens the section of his bio "Secretary of Commerce" with the line "Following the 2024 presidential election, Lutnick was being considered as secretary of the treasury." and I swapped the two roles.
While a smaller role, this is a worse conflict of interest as the secretary of commerce is directly responsible for recommending tarriff actions to the President.
