i can't get this to work for secrets or configmaps... i've this config in my helmrelease, and it works if i just leave the persistentVolumeClaim resource in there... once i add any of the configmap (which is just a test) or even 1 of the 2 secrets needed to access a nexus3 repo (and each of them exist in same jenkins namespace, cm and secrets), the resulting pod will include just the jnlp container and never the maven one...

        maven-0-7-0-nexus2: |
          - name: maven
            label: jenkins-maven-0-7-0-nexus2
            serviceAccount: jenkins
            containers:
              - name: maven
                image: ghcr.io/ecomind/jenkins-agent-maven:0.7.0
                command: "cat"
                ttyEnabled: true
                privileged: true
                resourceRequestCpu: "1"
                resourceRequestMemory: "2Gi"
                resourceLimitCpu: "2"
                resourceLimitMemory: "4Gi"
            volumes:
              - persistentVolumeClaim:
                  mountPath: /home/jenkins/.m2/repository
                  claimName: maven
                  readOnly: false
              - configMapVolume:
                  configMapName: cm-test
                  mountPath: /tmp/ui.properties
                  subPath: ui.properties
              - secretVolume:
                  mountPath: /home/jenkins/.m2
                  secretName: nexus-settings
              - secretVolume:
                  mountPath: /home/jenkins/.m2
                  secretName: nexus-settings-security

can't find an example of this, but what i did is coherent with official docs...