Yes, I thought it was on the virtual dash but is not. So much code has been changed around with the recent dashboard updates, it's quite hard to check every feature is still in the public version. In the VWS version it is on the car dashboard and the virtual one as well.
You are right it's not hard, but really needs a new "lights" section in the controls screen and the code for all those "one push" buttons needs some reorganising, actually would take about half a day to redo the code the way I want it (as very often it's a thing that if I delve into it, there are some updates and cleanups to do on the way). It's on my list but I put it at low priority compared with the physics we are all waiting for. Anyway you should be able to bind it to a steering wheel button using a F key with the text : /press 3
Yes, this is strange that some people get it and some don't. Unfortunately the bug doesn't seem to appear on my computer but that is on the list and as a real bug it does have a high priority.
The other high priority one is the crash some people have reported, an "integer divide by zero" (c0000094) at address 4c6a07. I do know the line where it happens, don't know why yet.