It is possible to group furnishings together. The individual furnishings may be interactable, such as lights and switches and gates. However the only benefit to grouping objects is allowing them to be moved together. if you group a bunch of lights together, or a light and a clockwork switch, interacting with one of the furnishings doesn't result in the others toggling.
With the recent focus on housing with the introduction of pathing, is this something that could be looked at please? It would allow for some nice bits of creativity, like using the clockwork switch I mentioned as a light switch, rather than just a dumb switch that can be rocked back and forth without the ability to control anything.
@ZOS_GinaBruno