Openshift loadbalancers Integration with Openstack Octavia

Issue

We currently have Openstack Octavia running in one of our clouds.
With the Openshift installer I've set octaviaSupport on:

apiVersion: v1
baseDomain: novalocal
compute:
- hyperthreading: Enabled
  name: worker
  replicas: 3
controlPlane:
  hyperthreading: Enabled
  name: master
  platform:
  replicas: 3
metadata:
  creationTimestamp: null
  name: os-test
networking:
  clusterNetwork:
  - cidr: 10.132.0.0/14
    hostPrefix: 23
  machineCIDR: 10.0.0.0/16
  networkType: OpenShiftSDN
  serviceNetwork:
  - 172.132.0.0/16
platform:
  openstack:
    cloud: quattro-userdev
    computeFlavor: m1.4large
    externalDNS:
    - 8.8.4.4
    - 8.8.8.8
    externalNetwork: <openstack-internet-pool>
    lbFloatingIP: <ip>
    octaviaSupport: "1"
    region: emea3
    trunkSupport: "0"
pullSecret: '<pullsecret>'
sshKey: <key>

While installing Openshift it does not create loadbalancers with Octavia.
It also does not create a loadbalancer when creating an Openshift service with:

kind: Service
apiVersion: v1
metadata:
  name: external-http-nginx-service
  namespace: external-test
  annotations:
    loadbalancer.openstack.org/floating-network-id: 21a04dba-18f8-4517-9a5f-adcd9bbd7af4
    service.beta.kubernetes.io/openstack-internal-load-balancer: 'true'
spec:
  ports:
    - name: http
      protocol: TCP
      port: 8080
      targetPort: 8080
      nodePort: 32630
  selector:
    app: hello-world
  clusterIP: 172.132.58.0
  type: LoadBalancer
  sessionAffinity: None
  externalTrafficPolicy: Cluster
status:
  loadBalancer: {}

1. How do I let Openshift create the Openstack Loadbalancers with Octavia?
2. Does it only work with in combination with Kuryr?
3. It is difficult to find a lot of documentation about this topic with Openshift 4+.