$ oc -n openshift-monitoring logs -c kube-rbac-proxy-main openshift-state-metrics-7f78c76cc6-nfbl4
W0514 23:19:50.052015       1 deprecated.go:66] 
==== Removed Flag Warning ======================logtostderr is removed in the k8s upstream and has no effect any more.===============================================
...

$ oc -n openshift-monitoring logs -c kube-rbac-proxy-self openshift-state-metrics-7f78c76cc6-nfbl4
...
W0514 23:19:50.177692       1 deprecated.go:66] 
==== Removed Flag Warning ======================logtostderr is removed in the k8s upstream and has no effect any more.===============================================
...

$ oc -n openshift-monitoring get pod openshift-state-metrics-7f78c76cc6-nfbl4 -oyaml | grep logtostderr -C3
spec:
  containers:
  - args:
    - --logtostderr
    - --secure-listen-address=:8443
    - --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
    - --upstream=http://127.0.0.1:8081/
--
      name: kube-api-access-v9hzd
      readOnly: true
  - args:
    - --logtostderr
    - --secure-listen-address=:9443
    - --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
    - --upstream=http://127.0.0.1:8082/

$ oc -n openshift-monitoring logs -c kube-rbac-proxy-thanos prometheus-k8s-0
W0515 02:55:54.209496       1 deprecated.go:66] 
==== Removed Flag Warning ======================logtostderr is removed in the k8s upstream and has no effect any more.===============================================
...

$ oc -n openshift-monitoring get pod prometheus-k8s-0 -oyaml | grep logtostderr -C3
    - --config-file=/etc/kube-rbac-proxy/config.yaml
    - --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
    - --allow-paths=/metrics
    - --logtostderr=true
    - --tls-min-version=VersionTLS12
    env:
    - name: POD_IP

4.16.0-0.nightly-2024-05-14-095225

always

1. see the description

logtostderr is removed in the k8s upstream and has no effect any more    

no such info