Recommendation for Multi Site Development Domain

Hello Support

We have Multi Site installed on a hub website with Domain Mapping plugin forwarding to 3 domains, more to come. Please make a recommendation for creating a development environment that is accessible online and supports our current configuration. The idea would be to test new versions of Wordpress, plugins, and website features before launching in production. Would you create a subdomain and copy the entire network there? Is there software or plugins that can perform these functions?