GMS v137 - Unleashed

I'm still really confused as to how to determine the actual HP of certain bosses from these extractions.

I'd imagine that these are not the actual HP's of the bosses, so how can I figure out what they really are?

They used to have a variable, finalmaxHP, that kept the real HP value (ones that exceed 2.1b), but it seems like they accidentally deleted it, so there's really no way of telling right now, from our end, except probably doing the bosses and keeping track of how much damage was done.