You can export a specified Actor Class into the Reality Setup. The actor class can be spawned on Reality Setup.
Click EDIT and then PROJECT SETTINGS from top menu. Scroll down, click Export menu under Reality category.
Click ➕ button under Actors subcategory. Expand it. Select Actor Class Asset will be expanded.
Click PLAY on Reality Editor.
Launch Reality Control and press F7 to launch Reality Setup.
Right right into space, select specified category and click display name.
As first, the actor will be spawned on game world. Subsequently, the actor node will be displayed on the nodegraph: