All datanodes are running but cannot see as live node in Ui portal

Question

Hi I am deploying hdfs in K8s Cluster. My K8s Cluster Architecture is one master and two worker nodes,
Where I am using DataNode and NameNode as StatefulSet.
Where I can run Hdfs. My current configuration is One namenode and five datanode.
My all datanodes are running and there are no error logs.
But In the namenode Ui portal, I can see only three datanodes. Does datanode need to be run on separate k8s-nodes to be seen in the portal?
Can we run mutilpe datanode on a K8s-node and access it from Namenode UI portal.