Hello,
Did you create the kubernetes service to expose apigee externally or you are trying the internal tests?
The error suggests a 404 which could mean apigee is unable to find the proxy at the basepath - /myproxy or Apigee is unable to route the request to the proxy or its backend from the ingress.
We have some playbooks documented here
Either way, this suggests Apigee is unable to load the backend or target endpoint you intend to expose with Apigee.
I suggest try making a new proxy with a simple target such as https://mocktarget.apigee.net for a start. If your setup is right you should get a “Hello, Guest!” response.
Hope this helps.