Api gateways can combine results from different apis into one.
Routing:

routes:
  - path: /users/*
    service: user-service
    port: 8080
  - path: /orders/*
    service: order-service
    port: 8081
  - path: /payments/*
    service: payment-service
    port: 8082

Resource

https://www.hellointerview.com/learn/system-design/deep-dives/api-gateway