Walmart customers might find something new next time they're looking for makeup and skin care products: in-store advisers offering personalized tips and recommendations. The retail giant is breaking out of its no-frills service model and staffing its beauty aisles with trained specialists who can suggest foundation shades to match a shopper's skin tone or knows about a moisturizer trending on TikTok. The roles were filled at 22 stores in Arkansas and Texas in recent months, and Walmart expects to have them in more than 400 of its 4,600 namesake U.S. stores by year-end. The addition of “beauty experts” comes as Walmart, rival Target, specialty chains like Sephora and department stores all are vying for a bigger slice of the $129 billion U.S. beauty and personal care market, including by offering customized advice and playful, interactive spaces to encourage consumers to shop in person as well as online.…