While Walmart has historically denied using "individualized" pricing (charging two people different prices for the exact same item based on their income), they do use behavioral targeting [1]

Members of Walmart+ often see different "final" prices due to exclusive discounts, rewards (Walmart Rewards), or waived shipping/delivery fees that aren't available to guest users. Walmart uses AI to offer personalized promotions. You might see a "Rollback" or a "Just for You" offer on an item you’ve viewed multiple times or purchased previously, effectively changing the price for you specifically via a targeted discount. Like many e-commerce giants, Walmart may also offer "first-time app user" discounts or "win-back" coupons to specific customer segments.

[1] https://goaura.com/blog/walmart-pricing-strategies