pf2e.fyi
From Pathfinder Lost Omens Draconic Codex, which isn't enabled.

Inhale, Exhale!

FEAT 5
CONCENTRATEDRAGONET
Activity 1 action
Prerequisites Dragonet Breath

You take an especially deep breath as a prelude to unleashing your dragonet breath on your foes. If your next action is to use your Dragonet Breath, add 5 feet to the length of the cone or line. If your breath deals damage, you also deal one additional die of damage.

Pathfinder Lost Omens Draconic CodexORC