I was confused about the shipping at first as well since it says 1 item, but for mine, I see if I hover over the item with the "image not yet available" placeholder image. It says "Starfinder Beginner's Kit (Humble Bundle 2021)", so I assume this includes both the Beginner's Box and the Pact Worlds Hardcover.
NOTE: the humble bundle page for physical item redemption lead to a 404 page for me. I came here and saw I had to scroll down for the shipping option.
