Think you figured it out but it was right after the start, top left of the first “roof” part in the starting area.
I think if you’re not already, for this type of level you want to use a tilemap, you can setup your tilemap resource with a physics layer and define a shape for the tile (just presumably a square over the whole tile) then you can just paint your level. Then your collisions will be consistent all the time! Also makes making a level much easier since you can just paint with the tiles on a grid!