No packages can be found. when use the catalogsource using the index image build from metatada image 5.1.preview.1-4 . 

Step 1: build index image
opm index add --bundles registry-proxy.engineering.redhat.com/rh-osbs/openshift-logging-cluster-logging-operator-bundle@sha256:e0b542e2d6449bf2c348f38a93f51a70b1f82a49d5986bc11daf28553b34dbb1 --tag quay.io/example/ocp4-index:cpaas-logging -c podma

Step 2: Create catalogsource
echo "#Create CatalogSource from $IIB"
cat <<EOF |oc create -f -
apiVersion: operators.coreos.com/v1alpha1
kind: CatalogSource
metadata:
name: qe-app-registry
namespace: openshift-marketplace
spec:
sourceType: grpc
image: quay.io/example/ocp4-index:cpaas-logging
EOF

Step 3: check the packagemanifests
oc get packagemanifests

Actual result:
No tech-privew packages

Expected result:
We can see 5.1.preview.1-4 package