I don’t know if it matters, but I bought it directly on itch back in February. Anyways, I go to:
my library->purchases-> Garden Path. Then scroll towards the bottom, under the itch download, and it says about steam.
hey thanks for replying. i got in contact with the garden path team on their discord and they sorted it out. i backed it years ago and collected the itch version so i never "bought" it in that sense, but they got me a steam key!