It's been that way now for a while that, if you pick up the quest after killing the goblin leaders, the ring is not a reward.
I was surprised to learn that recently, it *also* is not a reward anymore if the idol is stolen only after confronting Kagha!
Is this item meant to be a badge of shame for causing a mini civil war between druids and refugees? Or, is Bg3 just becoming *more* bugged over time? I'm struggling almost more than freshly after the release, it's hard to tell.