You can test a newly created email scope with cURL.
If you make the same request as earlier, a 403 is returned because the provided scope is not allowed.
curl --insecure -X GET https://localhost:7443/scim/v2/Me -H 'Authorization: Bearer {"active": true, "sub": "user.1", "scope": "nonexistent.scope", "client_id": "nonexistent.client"}'