pf2e.fyi
From Pathfinder Lost Omens Hellfire Dispatches, which isn't enabled.

Float Free

FEAT 6
ARCHETYPE
Activity 1 action
Archetype Undersea Privateer
Prerequisites Undersea Privateer Dedication
Frequency once per round
Requirements You're underwater.

You move 5 feet or up to half your swim Speed vertically through the water. This movement doesn't trigger reactions normally triggered by movement.

Pathfinder Lost Omens Hellfire DispatchesORC