ParentReference identifies an API object (usually a Gateway) that can be considered a parent of this resource (usually a route). The only kind of parent resource with “Core” support is Gateway. This API may be extended in the future to support additional kinds of parent resources, such as HTTPRoute.
https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1.ParentReference states
which has not been updated for the fact that in v1,
Service
is a supported parent also. This is correctly set in https://github.com/kubernetes-sigs/gateway-api/blob/main/apis/v1/shared_types.go#L23-L25, so perhaps the docs just need to be rebuilt?