From Pathfinder Lost Omens The Mwangi Expanse, which isn't enabled.

Rite of Light

HERITAGE

Your exoskeleton bears small shoots that can share life. When using your Sunlight Healing, you can restore the Hit Points of an adjacent ally instead of yourself. That ally becomes temporarily immune to all uses of Sunlight Healing for 1 day.

Pathfinder Lost Omens The Mwangi ExpanseOGL