In contrast, when using the microservices architecture the data displayed on the product details page is owned by multiple microservices. Here are some of the potential microservices that own data displayed on the example product details page:

Shopping Cart Service – Number of items in the shopping cart

Order Service – Order history

Catalog Service – Basic product information, such as its name, image, and price

Review Service – Customer reviews

Inventory Service – Low inventory warning

Shipping Service – Shipping options, deadlines, and costs drawn separately from the shipping provider’s API

Recommendation Service(s) – Suggested items

https://www.nginx.com/blog/building-microservices-using-an-api-gateway/