u/Hanathefrog

So I finally learned the threefold melody in Silksong and I assume this would lead me to act 3. I've alr defeated groal, explored sands of karak (except the top of the area that i can't reach for some reason), explored the putrified ducts, completed the great taste of pharloon wish, completed shakra's questline, beat the boss in wisp thicket, beat the forebrothers and im currently trying to beat the broodmother. Is there anything that I cant access in act 3 or I should explore before act 3?