Mostly yes but not 100% Would be better to use the website's library for higher accuracy https://royals.ms/library/
A follow up question, is there a resource anywhere that lists drop rates for each of the possible drops?
They don't want anyone knowing drop rates. I wish they would tell us, but I think it's in their best interest to keep us ignorant to that sort of thing. I think it's for the sake of diversity, but it's a huge hassle sometimes.
I wouldn't say the library is 100% accurate, probably 90% or so. Most of the time I refer to BBB HS. I have seen some monsters on the library that drops what isn't stated.