Hidden? It’s directly below where the “oh shit” handle is on the door, you need to move your hand less than 6” to pull it. Calling it hidden is completely misrepresenting reality. If my 7 year old knows where it is and insists on using it to open the door, I hope your 11 year old can figure it out.
From [1], I see it's a discreet, black lever with a small picture of a door opening. It perhaps is about 6" away, but in a space almost always obscured by ones legs.
Emergency controls in vehicles with proper regulation look like this [2], so they can still be used in the dark, with smoke, etc.
Humans expect tools to be at arm height. Do not work against natural assumptions. If you increase cognitive load, that's that much more attention diverted in a state where attention is already maxed out or otherwise in shortage.
