From Pathfinder Lost Omens Knights of Lastwall, which isn't enabled.

Sacred Armaments

FEAT 6

Prerequisites Lastwall Sentry Dedication

Through the power of your faith or the blessing of a priest, your weapons are fully effective against incorporeal creatures. Weapons you wield have the effects of a Ghost Touch property rune for as long as you wield them.

Pathfinder Lost Omens Knights of LastwallOGL