pf2e.fyi
From Pathfinder Lost Omens The Mwangi Expanse, which isn't enabled.

Defensive Instincts

FEAT 9
Activity 1 action

Requirements you are adjacent to at least two enemies

Your body tenses up when surrounded, putting you on edge just enough to anticipate an attack. You gain a +1 circumstance bonus to AC until the beginning of your next turn and Step.

Pathfinder Lost Omens The Mwangi ExpanseOGL