If you're talking about the beginning of the game, I won't spoil it, but makes sure you hit the electrical switch outside of the maze, then do a small bit of backtracking. You will see a platform open up that will clue you into solving the puzzle.
BRUH!!! I knew my game was broken! something happened that messed up the bridge tiles and i couldn't find the numbers. I brute forced the first two cause they were all even but I genuinely looked through the game files for the third!!! For reference, what happened was the tiles you get from the codes were all shifted to the side beyond the platform and the tile (that I now realize was) to the number area was floating. I genuinely thought the switch was just a weird box that made a noise and did nothing loudly crying face emoji