I don't think so, Kibana is the user interface of the stack used to visualize the data and manage the cluster, it also has some rest APIs.
Basically everything in Elasticsearch is REST based.
I do not have much experience with k8s, but normally with Elasticsearch people only use configmap to control the configuration file elasticsearch.yml, that you barely change after you started your cluster.
Apache, Apache Lucene, Apache Hadoop, Hadoop, HDFS and the yellow elephant
logo are trademarks of the
Apache Software Foundation
in the United States and/or other countries.