I actually play Ponyfinder with a DM in Pathfinder 2, so not that far off! Could you make some options for pony races too?
It would be pretty easy to run ponies through the scenario rather than griffons, since they both use the quadruped rules :) There are a few points where being able to fly is helpful (so there are options for it) but not essential, but generally.. you could replace a griffon clan charged with rpotecting the sacred pyramid with a pony clan or tribe charged with the same sacred duty and runt he scenario with no other changes. The module includes the rules to make griffon characters in case people don't have the ponyfinder rules, but if you already play ponyfinder, you'll be fine already. (also, sorry about the long delay replying, I thought I had already and.. I was wrong. oops.)