From Pathfinder Lost Omens Character Guide, which isn't enabled.

Tusks (Half-Orc)

FEAT 1

Most half-orcs have visible tusks, but yours are particularly large and sharp, capable of gouging deep wounds. You gain a jaws unarmed attack that deals 1d6 piercing damage.

Special You can take this feat only at 1st level, and you can't retrain out of this feat or into this feat.

Pathfinder Lost Omens Character GuideOGL