Your oil pressure is acting the way it’s supposed to. As stated about the 2.0 has a variable pressure oil pump. Most all of the newer engines have this. It has less drag and lower pressure when not needed and increases when needed. It is done for CAFE as another tool for better fuel economy.
I’d avoid the Sahara at this point just because of the eTorque systems. My 2020 Wrangler has the 2.0T and so far its been fantastic. The fuel economy for a Wrangler is great, torque is great, and been reliable so far. Either engine is fine.