Not sure on either of them 100% but Milei seems easier to put in a category. From what I have heard and read from people that follow him and are familiar with his background he is a libertarian from the Austrian/Mises side of the spectrum.

Bukele doesn't seem as ideological. I'm not sure where he'd fall honestly. Just because he made bitcoin legal tender, that doesn't make him a libertarian. I don't live in either country though and its their business. I think it is interesting to watch things unfold. I don't think you can look at either nation and say. See it worked. Or see it didn't work. That will happen as people love to do that but both nations have serious issues they are dealing with. Both seem to have went far left prior to the current admins. I think both rulers seem to be making better decisions than the rulers of most democracies in the world. I wouldn't say I sign off on everything either of them are doing, but then I would refuse the position if it were given to me :)

I am very confident is saying that both of these guys are misrepresented in the press and that is very intentional. Neither seem particularly "far right" to me. I hope for the sake of the people of both nations that these rulers are doing things that will make life better for them.