I had been playing since day 1, and on day 6, the collectible item did not appear.
After completing the mission on day 6, I quit the game and went to retrieve the item after starting day 7, but the power did not turn on and I could not open the door.

In Japanese, the message when the airlock repair is completed is switched between airlock A and airlock B, and airlock C and airlock D, respectively.