pf2e.fyi
From Pathfinder Howl of the Wild, which isn't enabled.

Heightened Instincts

FEAT 18
ARCHETYPE
Archetype Beastmaster
Prerequisites Beastmaster Dedication

You've worked to sharpen your companions' instincts to supernatural levels. When one of your companions rolls a success on a saving throw, it gets a critical success instead.

Pathfinder Howl of the WildORC