From ODL document:  https://docs.opendaylight.org/en/stable-oxygen/user-guide/netconf-user-guide.html

odl-netconf-clustered-topology needs to be installed instead of odl-netconf-topology

in APPC now, we only have  below in installFeatures.sh

echo "Enabling core APP-C features"
featureInstall odl-netconf-connector-all
featureInstall odl-restconf-noauth
featureInstall odl-netconf-topology

In order to make that works.we need:

1,We have to replace odl-netconf-topology to odl-netconf-clustered-topology bundle

2, Also in OOM env, we need to make installFeatures.sh in place under k8s env.