The operational policy is always null in the yaml generated for policy api.

Moreover the expected value in the UI will look like that (YAML format):

requestParameters: '{"usePreload":true,"userParams":[]}'

configurationParameters: '[{"availability-zone":"$.vnf-topology.vnf-resource-assignments.availability-zones.availability-zone[0]","xtz-123":"$.vnf-topology.vnf-resource-assignments.availability-zones.availability-zone[0]"}]'

Also the actor should not be MSO in the policy Yaml but SO instead.