On my multiplayer game, as the host whenever I enter the ocean, the orb platforms will show up on the map if I'm within a certain distance from them. When my husband enters the ocean, they do not show up on the map for him until he heals them. If I enter with him, they then show up for him but until then he has no idea where the orbs are going until he comes across the platform itself with the golden path coming out.
#Solar Orb Platforms
fallow mural
fallow mural
I forgot to mention this was on PlayStation.
frail river
Hi @fallow mural , thank you for reaching out to us! Would you be able to share a screenshot or video showing how the map looks in three situations: when the Host is diving alone, when the Guest is diving alone, and when the Guest is diving with the Host?
This would really help us get a clearer picture of the issue 
fallow mural
We have a screenshot showing that he is not seeing the platforms until they are completed. Unfortunately we have finished all of them so we cannot take the other screenshots
fallow mural
Just for a bit more context since we cannot take any more screenshots as we have finished the ocean. Where he is standing in the above screenshot, there should be two of the platforms above him that are incomplete (meaning they are a silver color). For him, they were only showing up once he followed the solar trail and fully cleared its path.
However, if I entered the water and went near him, then the unfinished platforms would then show up on his map.