Scene object NetworkBehaviour strategy for networked and single player advice

I'm looking for advice on the right setup for being able to place scene objects which have state synchronization (i.e. via NetworkBehaviour) for multiplayer, but also have the option to be used for single player. It seems that scene objects with NetworkIdentities are disabled until a connection is instantiated (I understand this is expected and documented).

However, clearly for a single player version you don't need / want to boot up a server or client. What is the recommended strategy...

Scene object NetworkBehaviour strategy for networked and single player advice