pf2e.fyi
From Pathfinder Advanced Player's Guide, which isn't enabled.

Peafowl Stance

FEAT 4
MONKSTANCE
Activity 1 action
Prerequisites Monastic Weaponry
Requirements You are wielding a sword that has the monk trait in one hand.

You enter a tall and proud stance while remaining mobile, with all the grace and composure of a peafowl.

While in this stance, the only Strikes you can make are melee Strikes with the required sword. Once per round, after you hit with a monk sword Strike, you can Step as a free action as your next action.

Pathfinder Advanced Player's GuideOGL