Actually, you can set the switch to 1 as scubapr mentioned, which turns off the headlights at least.
But the rest of the lights like tail lights, licence plate lights stay ON.
Another annoyance is that the Navigation system especially Android Auto keeps going dark and bright with that Auto sensor system in Lexus as I go under a small bridge.
You could change Android Auto setting so that it doesn't turn the night mode I guess..
Turning headlights ON and OFF automatically in this Lexus seems to be really sensitive.
My previous car (non-Lexus) wasn't this sensitive, it would only turn on if the car has been in the dark for more than 3-4 seconds.
Wish it wasn't that sensitive.
I guess my older car was a little slow to detect the light change.
Lexus's auto sensor is too good haha

 

Yes! I actually have mine on "Night" instead of auto. I hated the screen switching; and it looks more elegant during daylight. On your phone go to "Settings > Connected Devices > Android Auto" and select the best suited option.

 

Wish I could set it to +4...
I think that would have been perfect.

 

I am seeing same on my 2021 Lexus ES250, auto headlights is so so so so sensitive. I have tried to change in settings -1, -2, 0, +1, +2 ... i never noticed any change in functionality, always stays so sensitive. Sometimes i turn on this feature to ON while driving in the city / my neighborhood and they turn on, when its not even that dark

 

If you watch for the "Green Lantern" icon on the dash to indicate the Headlights/Taillights are actually on you may discover that the brief dimming of the main screen
when passing into darkness is much quicker to activate both dim and then return to brightness than the external lights. The mains don't come on for 10 or more seconds.

 

Dimming of the screen is also annoying though. It is not that dark outside and it dims and I cannot see the screen which defeats the purpose.
That setting should have been expanded I think. -2 to 2 range isn't enough. Something like -5 to +5 would have been better and more occurate.

 

I bumped mine up a notch but then it was almost black before they’d come on! Set it back to factory setting.