I seem to be unable to get the fish trap to behave like a bridge.
I have been attempting to use the placement photos from offline guides such as from https://www.fisicx.com/uru/walkthrough.htm
This is my current position as of this post
I have also tried to avoid the fireflies and go by memory (eg explore offine using "offline ki" and its /glow command and then go from there).
However, it seems items like the steam generator, door lever, and Journey patch do not function without having fireflies. (also as a side note this seems to be equivalent to uru CC offline where nothing can be interacted with in the dark even with /glow)
A possible fix could be to tilt this structure over just enough that a player could walk on it but they would need to be extra careful (eg a tightrope walk)
As a kind of bonus have me standing in the same location in gira (right in front of the hidden steam generator in the first black cave) in both uru offline and ghen. Left is offline right is ghen. (open image in new tab)