kinda needs more context, i mean are they all instances of the same actor? or different ones? If you want you can use the ‘get all actors of class’ node to hide all actors of the same class at once.
Way I would do it is implement an interface with hide and unhide message events.
Then when you need a specific mesh hidden, you send a message through the interface to the specific actor and within that actor’s blueprints, toggle visibility based on which message it received.