With my car, after a double click, the flashing led, at the front of the driver’s door top, stops flashing, which I guess means that the internal stuff has been switched off. Another single click starts the led flashing again. Not something I use, so I hadn’t missed the pillar button until I read this thread.
This works if you have previously also tapped the door handle lock dimple, after clicking the remote, to disable keyless entry. The keyless remains disabled, but you can toggle the internal led using double clicks, or single clicks.
I haven’t checked which monitors remain active when the led is off.