How can we place multiple objects using touch in AR?

Hi , Im working on AR template provided by Unreal. So currently when I click or touch on screen the given Object (Placable) is getting spawned.Now , if I click on reset I want the placable(mannequin) of pervious(1st) to be locked(in AR ) and after another touch it should spawn my 2nd AR object.So now ill have 2 ar objects in scene.So how can we achieve this?