This is an awesome feature, but the posted instructions did not work for me. When I copied the full URL (e.g. https://sketchfab.com/3d-models/$name-$hash) and posted it into the “description” field of my itch project page, all I got was a link. What worked for me was clicking “share” in sketchfab, copying the HTML for embedding, and pasting that into the description.
Thanks for implementing this!