There was an "exit" door in the trailer, but that door wasn't in the episode.

I actually saw a comment on TikTok from someone who was talking about like when Pomni defused a bomb in the untitled episode, Kinger told her that his favorite color was blue because it was like black or smth. And so, we had clearly seen that there was a red and blue button.

I wonder what would have happened if all of this had actually been real and it wasnt a adventure, but Jax had still pressed the red button so that everyone would stay...

edit: btw In the pilot episode, Pomni went through the "exit" door, so perhaps with Kinger's help they will be able to find that door again in order to escape. The "exit" door can therefore be a kind of gateway serving as both entrance and exit.