For the longest time, WU money orders could be mobile deposited but then in the past 1-2 years or longer, they explicitly said, “CAN NOT BE MOBILE DEPOSITED,” but as of I want to say October 1, 2026 (or when your store gets the new money order paper), they now say they can be mobile deposited. See pic below
Maybe they haven’t gotten the new ones in yet but Kroger is still showing no mobile deposit as of yesterday.