Hey, I would like to see an option to enable seeing a bounding box around the fishing bobber that would let us see if it can catch treasure in the current water

"To catch items in the treasure category, the bobber must be in open water, defined as the 5×4×5 vicinity around the bobber resting on the water surface (2 blocks away horizontally, 2 blocks above the water surface, and 2 blocks deep)." - https://minecraft.fandom.com/wiki/Fishing#Junk_and_treasure

Support. Wurst has this and it seems to work well.