pf2e.fyi
From Pathfinder Lost Omens High Seas, which isn't enabled.

Decisive Swimmer

FEAT 1
Prerequisites trained in Athletics

You are a talented athlete trained to compete in swimming competitions, and would sometimes be asked to help your community settle disputes with others by participating in swimming races. When settling disputes with other aquatic or amphibious people, you can use Athletics instead of Diplomacy to Request.

Pathfinder Lost Omens High SeasORC