Patch Sidecar Proxy(auto-inject) with containerPort & name addition

Config
1

Hello Team,
I have a custom Prom server deployed outside the cluster and I have a cloudagent running in my cluster (as daemonset) that scrapes the metrics from Istio Control & Data Plane and pushes it to that external Prom Server. This cloudagent specifically look for certain annotations like prometheus.io/scrape:true & it does scrape from all containers separately based on this
Assume my pod has 2 containers(istio-proxy & application). I will do scrape both metrics like below

        0.prometheus.io/path: '/stats/prometheus'
        0.prometheus.io/port: '15020'
        1.prometheus.io/path: '/actuator/prometheus'
        1.prometheus.io/port: '8080'

In addition to that annotation, it also requires container port has to be added with a naming convention end with *-metrics-*

...
    spec:
      containers:
        - image: envoy
          containerPort: 15020
          name: envoy-metrics-0
...
...
        - image: myapp
          containerPort: 8080
          name: authz-metrics-1
...
...

I can do patch control pane pods and their metrics are obtained. But I need guidance on how to handle the same for data pane pods(sidecar proxy) patch in auto inject mode?