Not 100% sure about the 2020, but the 2021 only had foggers for the SL and Platinum trims, the lower trims just had a black plates where the foggers would go. That being said, I would guess that the stock foggers could be installed and that the proper wiring connections are already part of the main wire harness. The only complication you might run into is having to initialize those connections via the BCM or ECU/ECM using Nissan's hardware, meaning you might have to have the Nissan dealership program the new lights to work and to be integrated into the entire system.
It sounds like you're saying the control lever on the left of the steering wheel doesn't even have the dial to control fog lights. If that's true, it sounds like a bigger project with more cost involved. I can't imagine that the lower trims would totally lack the ability to have stock things added in, but who's to say. Maybe to save money Nissan created two different wire harness configurations, making it impossible to have fog lights like the higher trims.