Digital Twin concept is one of the technologies that is being applied in different areas, especially for lifecycle product management in industry environments. Recently, Digital Twin became a trend in network planning, management, operation, and optimization as it demonstrated its value in managing complex systems, and for that reason it can be a disruptive technology for the future generations of communication networks. In this work we propose a Network Digital Twin to improve experimentation and verification frameworks, to reduce the lead time required for validating a new business use case using 6G technology. We describe a concrete use case, a Digital Twin of the private part of a Non- Public Network and how Digital Twin concepts helps to improve the deployment time and the observability of a new network segment, integrated with existing experimentation facilities.