I’m having the same problem. I assume you’re not content adding components to your game board, but you wish to access each grid tile in the Editor.
Since it is possible to create actors inside a component in the construction script (this is what the Add ChildActorComponent node does), I’m wondering if it’s possible to create the actors inside a component and expose them to code that moves their outer from the containing scenecomponent to the level. I haven’t tried this myself but it’s currently where I’m at in my experimenting.