It does in the engineer’s minds eye, doesn’t exist in terms of what you can buy.
ANC sound volume has to be the same as the source to cancel it out, as it doesn’t cancel perfectly you get hiss.
Ambient mode as it transmits the source will cause a feedback loop, which places upper volume level related to how tight a seal in the ear canal. The seal is not that good for the LA2P but better on the L2P. The Liberty 3 Pro to give ambient mode will need a microphone just behind the grill, which will be quite the engineering feat.
I’m saying you can’t just wish a better ambient performance in an existing product, it has to be engineered.
Of course in the mind’s eye you can name a product what you like.