Instanced Actors is an experimental UE project that provides interactable actor LOD-ing for editor-time, stationary but interactable actors. This tutorial walks you through how to set it up, and how it can be further customized for different visual states, custom properties and replication.
https://dev.epicgames.com/community/learning/tutorials/eGYq/unreal-engine-your-first-60-minutes-with-instanced-actors