Or, what will be solution to implement such functionality?

Hi Vitaly - registering Flows from within Flows it not currently supported; may I ask what use case you have for this pattern?

Hello Chris, We need to support cold start scenario, for several environments of the product, session details and settings are in database, and we need to register large number of flows, dynamically combining tasks for them. The idea was just kick-off one launcher flow and register more from that flow. Another scenario is to register updated versions of flow, from time to time.