pf2e.fyi
From Pathfinder #153: Life's Long Shadows, which isn't enabled.

Quicken Heartbeat

FEAT 10
ARCHETYPE
Activity 1 action
Archetype Golem Grafter
Prerequisites Golem Grafter Dedication
Frequency once per turn

You've replaced your heart with one made of animated quicksilver and living adamantine. You reduce your Slowed condition by 1. Alternatively, if you are not slowed, you are Quickened during your next turn, and can use your extra action to Stride or Strike.

Pathfinder #153: Life's Long ShadowsOGL