pf2e.fyi
From Pathfinder Lost Omens Character Guide, which isn't enabled.

Cobble Dancer

FEAT 13

You know how to take advantage of foes thrown off-balance by unstable flooring, loose cobblestones, or similar impediments. While in an outdoor urban environment, you can Step into difficult terrain and enemies in difficult terrain are off-guard to you.

Pathfinder Lost Omens Character GuideOGL