For Example: Update of technical contacts when the registrar does not run the name servers.
Answer: No, Registry Services will not provide a special function for bulk updates of any objects. Updates will be performed via EPP, regardless of whether it is a matter of one or many updates. The function or script for bulk updates is something that the registrar must implement on its own.
The name servers that redirect to the domain name have nothing to do with whether or not a registrar can link a technical contact. Linking a contact is updating of a domain object, and the same applies for changing the domain object’s name server. What is required, on the other hand, is that the registrar manages the domain object in question. If, on the other hand, the update applies to a specific name server (host object), for example adding an IP address, it is of interest which registrar administers the host object to be updated.