The fps performance absolutely tanks at the last zone and I don't know how to fix it.

I'm on rtx 3050, not the best sure but the game was running beautifully with everything on high settings up until now and I've tried all manner of lowering settings to make it run smoother. Ive updated drivers and tried turning off the usual drains and lowering view distances and settings but its making it worse. I don't know how to fiddle with the NVIDIA settings. Anyone have any guide for this?