Can't find the exit

[Yorbos]

it's 14th floor, just next stage of minotaur maze.
what happened

https://imgur.com/Vaujf9p

[Tiny]

If I had to guess, I would say the exit is under one of the boulders. I don't recall what the pink dot is though, so could be there too.

It doesn't look like you missed any areas, so it must be hidden under something.

[LazyTavi]

I see what looks like a couple unchecked spots in the central-north and central-east areas. These exits have really gotta be in better places though, it can be downright infuriating hunting them down like this.

[Yorbos]

pink dot is the shopkeeper, and I guess that if the boulder blocks the way to the exit, the "gods of Sokoban" will get rid of it.

eventually, I found it.
I load the save and checked it again, and found that there was an area I didn't check. That's the central-west, pop-up sand wall area.
just I entered the area from north, and my sight was blocked by sand wall before checking the exit. I thought the 'unchecked spot' as a natural pit like others, so I didn't thoroughly explore the map

https://imgur.com/pXqHjFb
https://imgur.com/uoZfCRb

thank you for taking the time to work with me to guess it