pf2e.fyi
From Pathfinder #151: The Show Must Go On, which isn't enabled.

Whirlwind Stance

FEAT 10
UNCOMMONARCHETYPEFLOURISHSTANCE
Activity 1 action
Archetype Staff Acrobat
Prerequisites Staff Acrobat Dedication; expert proficiency in your staff
Requirements You are wielding your staff, which must have the parry trait.

You use your staff as a defensive implement as well as an offensive one. You gain a +2 circumstance bonus to AC as long as you remain in this stance.

Pathfinder #151: The Show Must Go OnOGL