Idk its def not intentional to get to the store because if you go to the store via enby skips entrance it will deload the entire boa

"The weird hallway. There appears to be no way to access it apart from falling into it from out of bounds. It connects to the maze, which is accessible from other areas, but why wouldn't that hallway just be part of the maze map? Why would it be here?" Now that is due to it being future content or a secret when asking a dev of the game they chose to stay silent about it for a reason