Will API Gateway be on CKA?

As Kubernetes Gateway API is the successor or Ingress API, is planned to add it to the courses? It will be included in the topics required for the CKA exam?

No idea. Not until such time as it appears here: https://training.linuxfoundation.org/certification/certified-kubernetes-administrator-cka/

True, it only refers to Ingress on the networking section. Thank you.

Gateway API will be a feature of the revised CKA course, rolling out in early 2025.

Pending update of the course material, you can experiment with it by following this guide.