Drivers side litronic low beam issue - I'm stumped

[Stl-986]

Looks good.
Correct, obd2 can't read litronic codes

Ok, still sounds like a wiring issue. Dont know what year your car is. I dont have any apart right now but if you look where the headlight goes into the car there is a wiring harness (loose) and a connector that the lights plug into. Check both of these. The bigger connector has a yellow sliding clip on the back side, make sure that is secure and the connector isn't able to move. On the loose connector make sure the tab that clips into the light is still there and that the plug can't pull away from the headlight.

Wouldn't hurt to give the male end of the connectors a light sanding and spraying di-electric on the ends and in the body side connectors/plugs.

Other thing will be a potential loose connector at the controller. Some cars this is in the frunk behind the carpet, believe pass. side. On others it is inside the car, passenger side, right below the dash airbag. I had one where some of the connectors had pulled away from the plug and just needed to be pushed back in and all was good after that.

Check with your local PCA as well, they (or someone in the club) might have a durametric you could borrow.

Last thing is it could be the headlight switch. You said you removed it and cleaned it, but these are common failure items and will cause all sorts of weirdness. It's cheap to replace. If you do replace it, I suggest replacing the ignition switch at the same time since you are right there and it makes replacing both easier at the same time.