GA Operator CRDs are expected to ship structural schemas. See https://v1-16.docs.kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/#specifying-a-structural-schema for details on what that is.

The OpenShift Console uses these structural schemas to provide a richer UI experience. And `oc explain` uses these structural schemas to help a user understand the CRD.