When configuring nicMapping in ovn.template.ovnController.nicMappings, a network attachment definition is created
ovn:
template:
ovnController:
networkAttachment: tenant
nicMappings:
access: enp7s0
datacentre: enp4s0

[zuul@controller-0 crs]$ oc get net-attach-def access -o yaml
apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
creationTimestamp: "2024-04-26T13:37:40Z"
generation: 2
labels:
service: ovn-controller-ovs
name: access
namespace: openstack
resourceVersion: "6039198"
uid: 0ede9c09-8889-48fe-8a0d-f740790ec279
spec:
config: '

'

If we remove control plane, this CR is not removed
If we update control plane, this CR is not updated