How to create a policy to check namespaces which has prefix 'xyz'?

Issue

• How to create a policy to check namespaces which has prefix 'xyz'?
• We're creating a policy on ACM console and we're seeing that "spec.namespaceSelector.include" doesn't "include" the namespace regex we specify.

 namespaceSelector:
   include:
   - xyz-*
 object-template:
   - complianceType: musthave
     objectDeinition:
     apiVersion: v1
     kind: Namespace
     metadata:
       labels:
         environment: test