Once a dual stack deployment finishes, if you check the "oc get nodes -o wide" or "oc get node -o jsonpath='{.status.addresses}'" it only reports the primary IP when under the hood if has both, IPv4 and IPv6:


oc get node hosted-worker0 -o jsonpath='{.status.addresses}' | jq
[
  {
    "address": "192.168.126.30",
    "type": "InternalIP"
  },
  {
    "address": "hosted-worker0",
    "type": "Hostname"
  }
]

Meanwhile the node OVN annotations shows the truth:

apiVersion: v1
kind: Node
metadata:
  annotations:
    capacity.topolvm.io/00default: "0"
    capacity.topolvm.io/vg1: "1930763960320"
    cluster.x-k8s.io/cluster-name: hosted-gv9rt
    cluster.x-k8s.io/cluster-namespace: clusters-hosted
    cluster.x-k8s.io/machine: hosted-84f6f6c874-98fkq
    cluster.x-k8s.io/owner-kind: MachineSet
    cluster.x-k8s.io/owner-name: hosted-84f6f6c874
    csi.volume.kubernetes.io/nodeid: '{"topolvm.io":"hosted-worker0"}'
    hypershift.openshift.io/labelsSynced: "true"
    k8s.ovn.org/host-addresses: '["172.20.0.1","192.168.126.30","2620:52:0:1306::17"]'
    k8s.ovn.org/l3-gateway-config: '{"default":{"mode":"shared","interface-id":"br-ex_hosted-worker0","mac-address":"aa:aa:aa:aa:11:01","ip-addresses":["192.168.126.30/24","2620:52:0:1306::17/64"],"next-hops":["192.168.126.1","fe80::5054:ff:fe23:feb2"],"node-port-enable":"true","vlan-id":"0"}}'
    k8s.ovn.org/node-chassis-id: 13fe1058-d10c-4a12-9472-2896d736b273
    k8s.ovn.org/node-gateway-router-lrp-ifaddr: '{"ipv4":"100.64.0.4/16","ipv6":"fd98::4/64"}'
    k8s.ovn.org/node-mgmt-port-mac-address: 86:a6:df:01:6a:1b
    k8s.ovn.org/node-primary-ifaddr: '{"ipv4":"192.168.126.30/24","ipv6":"2620:52:0:1306::17/64"}'
    k8s.ovn.org/node-subnets: '{"default":["10.132.0.0/23","fd01:0:0:1::/64"]}'
    volumes.kubernetes.io/controller-managed-attach-detach: "true"

$ oc version 
Client Version: 4.13.3
Kustomize Version: v4.5.7
Server Version: 4.13.4
Kubernetes Version: v1.26.5+7d22122

100%

1. Install 4.13 OCP dual-stuck BM hub cluster
2. Install MCE 2.3 and Hypershift operator
3. Render the files using the CLI and modify them to be dual stack and other needed details
4. Apply the manifests
5. Create the VMs and BMHs
6. Wait for the deployment to finish

oc get node hosted-worker0 -o jsonpath='{.status.addresses}' | jq
[
  {
    "address": "192.168.126.30",
    "type": "InternalIP"
  },
  {
    "address": "hosted-worker0",
    "type": "Hostname"
  }
]

oc get node hub-ctlplane-0.dual.lab -o jsonpath='{.status.addresses}' | jq
[
  {
    "address": "192.168.126.20",
    "type": "InternalIP"
  },
  {
    "address": "2620:52:0:1306::5",
    "type": "InternalIP"
  },
  {
    "address": "hub-ctlplane-0.dual.lab",
    "type": "Hostname"
  }
]