There will be some sort of commercial/transactional interest in it for Trump. It's not like he's going around the world playing Mr Higher Moral Sherriff in any respect (like the Americans always used to).
It just may simply be that he's trying to control Venezuelan oil to line his pockets and this is simply the side effect. The US has been sanctioning Cuba since the Cuban missile crisis.
I thought the sanction would have been removed during the period of 1991 to 2014 (maybe 2022) as it was primarily due to the USSR/Russia.
I was wrong but Obama did lift sanctions until 2017 when guess who put them back in place.
Another consideration - Every year since 1992, except for 2020 due to the
COVID-19 pandemic, the U.N. General Assembly has passed a
non-binding resolution that condemns the ongoing impact of the embargo and declares it in violation of the
Charter of the United Nations and of international law. Israel is the only country that routinely joins the U.S. in voting against the resolution.
It is my belief that Donnie wants to bring them to heel and beg to become part of the USA, along with Canada, Greenland, Panama and probably others.