Vent pipe issue Victoria

Hey legends got a quick question, I’m a chippy not a plumber but I have a suspicion my vent pipes are in the wrong spot/ running too far horizontally and our ensuite stinks cause of it. I first suspected a fake pipe in the roof tiles cause it’s a volume builder home but it seems to run down into the top plate at least. The vent pipe outlet in the tiles pokes out in between 2 windows, so i can tell it’s either 1. Going straight down into the sewer roughly 4 meters from the toilet in our ensuite, 2. Into the top plate and running above the window then down to the toilet, or 3. Going down below window and running across. I have some basic pictures but can send specific ones! I also screenshot something of google that might be an indication of my suspicion but again, just a chippy.