How can I connect different geometry collections using a proximity?

I want to connect geometry collections placed within a world or blueprint using distance, but how can I connect different GC assets?

The dataflow has a Proximity node, but it seems to only work within geometry collections.

Basically, I want them to be completely glued together and behave as if they were a single geometry collection.

Previously, Cluster Union or Cluster Group seemed promising, but they stopped responding to line tracing, so I’m exploring whether the same thing can be achieved with Proximity.