Does alphaConfig upstreams is fully supported in production config in app version 7.9.0 helm version 7.12.14

[anand188]

Does alphaConfig upstreams is fully supported in in production config app version 7.9.0 helm version 7.12.14
upstreamConfig:
upstreams:
- flushInterval: 1s
id: /
passHostHeader: true
path: /
proxyWebSockets: true
uri: http://service1:8080
- flushInterval: 1s
id: /service2/
passHostHeader: true
path: /service2/
proxyWebSockets: true
injectResponseHeaders: #Expected Behavior
- name: yyy
values:
- value: yyy
uri: http://service2:8081/service2/
if so any example of how to values.yaml with configFile would be helpful like examples of reverse proxy with regex path rewrite