VR Dev - How to get models ready to make them interactive? (Specifically Buttons)

Hello, I apologize if this is a stupid question.

To give some context, I made a phone model in blender, and I want the buttons to be pressable by the player. As in, sink into the phone and actually look like a button.

Would I need to import animations I create into UE4? Or would I have to set up the model in a way so that they are able to move, but don’t have any animations set per say? If so, how would I go about doing it?

Pic related, it’s the phone base. Just to provide some idea of what I’m dealing with.

I would appreciate any pointers you’d be able to give me. Thank you.