When install a cluster on IBM cloud, the image registry default to Removed, no storage configured after 4.13.0-ec.3
Image registry should use ibmcos object storage on IPI-IBM cluster 
https://github.com/openshift/cluster-image-registry-operator/blob/master/pkg/storage/storage.go#L182 

4.13.0-0.nightly-2023-02-27-101545

always

1.Install an IPI cluster on IBM cloud
2.Check image registry after install successfully
3.

oc get config.image/cluster -o yaml 
  spec:
    logLevel: Normal
    managementState: Removed
    observedConfig: null
    operatorLogLevel: Normal
    proxy: {}
    replicas: 1
    requests:
      read:
        maxWaitInQueue: 0s
      write:
        maxWaitInQueue: 0s
    rolloutStrategy: RollingUpdate
    storage: {}
    unsupportedConfigOverrides: null

oc get infrastructure cluster -o yaml
apiVersion: config.openshift.io/v1
kind: Infrastructure
metadata:
  creationTimestamp: "2023-03-02T02:21:06Z"
  generation: 1
  name: cluster
  resourceVersion: "531"
  uid: 8d61a1e2-3852-40a2-bf5d-b7f9c92cda7b
spec:
  cloudConfig:
    key: config
    name: cloud-provider-config
  platformSpec:
    type: IBMCloud
status:
  apiServerInternalURI: https://api-int.wxjibm32.ibmcloud.qe.devcluster.openshift.com:6443
  apiServerURL: https://api.wxjibm32.ibmcloud.qe.devcluster.openshift.com:6443
  controlPlaneTopology: HighlyAvailable
  etcdDiscoveryDomain: ""
  infrastructureName: wxjibm32-lmqh7
  infrastructureTopology: HighlyAvailable
  platform: IBMCloud
  platformStatus:
    ibmcloud:
      cisInstanceCRN: 'crn:v1:bluemix:public:internet-svcs:global:a/fdc2e14cf8bc4d53a67f972dc2e2c861:e8ee6ca1-4b31-4307-8190-e67f6925f83b::'
      location: eu-gb
      providerType: VPC
      resourceGroupName: wxjibm32-lmqh7
    type: IBMCloud 

Image registry should use ibmcos object storage on IPI-IBM cluster 

Must-gather log https://drive.google.com/file/d/1N-WUOZLRjlXcZI0t2O6MXsxwnsVPDCGQ/view?usp=share_link