The Biden administration has preferred to let leaders of Colombia, Brazil and Mexico take the lead pressuring the Maduro government, but a more active U.S. role may be inevitable.
I believe OP is referring to our actions in the 80s which has ultimately led up to the current state of affairs. This is actually precisely what our government wanted, so of course they aren't doing anything now.
Don’t forget Mrs. “I’m with Her”’s nod and wink to the coup in Honduras that fucked things up in pretty permanent fashion there up to and including to the present day