Hey -
I’m unsure of what exactly you’re trying to accomplish. If you are trying to include certain code when working/playing the game in the editor then the WITH_EDITOR wrapper will do this for you. If you are trying to include certain assets while in the editor that you don’t want in the final release, those assets would have to be explicitly removed before packaging. However data from those assets would be removed as well unless saved elsewhere (such as a separate file that is explicitly included in the packaged version).
It would be possible to create an actor/asset (such as a blueprint) that isn’t actually placed anywhere. You can use the asset within the editor but as long as all references to it are removed before packaging then it would not be accessible in the final game.
If you have any other questions please describe how you are trying to use the actors you’re referring to. Having a better understanding of what you’re trying to do will help determine if it is possible and if so, what options are available.
Cheers