opendaylight-user@root> feature:install odl-restconf-nb

$ curl -X GET  http://localhost:8181/rests/data/ietf-restconf-monitoring:restconf-state/streams

...

$ curl -X GET http://localhost:8181/rests/data/ietf-restconf-monitoring:restconf-state/streams/stream=data-changed-notification/access=JSON/location?start-time=202
3-06-23T18:20:18.00000Z

{
 "errors": {
   "error": [
     

{        "error-tag": "malformed-message",        "error-message": "Invalid parameter in read: start-time",        "error-type": "protocol"      }

   ]
 }
}