UE5 FX creation Blueprint & Niagara Plexus/graph

Hi! I need to create a visual effect for my project in Unreal Engine 5. There is a scene with a crowd in the city park. I need to create visualization of digital connections between people, every actor in the system should be equal and connected to 3 nearest neighbors. Effect should be procedural, meaning I should be able to include any actor in the FX system just by adding a blueprint to my actors, also should be working with instances. Your work could be made with basic geometric primitives. And the connections should be just basic Niagara Beams.
Again, no hard references to objects, only procedural.