This is Kate from PageFly - Shopify Landing Page Builder App.
To add the “You may also like” product list into the product details, here are some recommended apps for you to use:
Wiser Product Recommendations: You can display customized suggestions in your store to boost the average order value and conversion rate. Wiser offers a range of features such as Post-Purchase Upsell, ‘Frequently Bought Together’ or ‘Just Bought’ displays, In-Cart Upsell, Handpicked Recommendations, Checkout Upsell, and Related Products,…
Upsell & Cross Sell — Selleasy: Upsell & cross sell offers can be created manually or using automatic product recommendations.
Related Products | Cart Upsell: This app offers both automatic and manual recommendations for related products. You can define rules for automatic suggestions based on tags, collections, or other criteria.