Finding Paths between Node Communities

Neo4j Graph Platform
1

Hi there,
I am a newbie to Graph Data Science and trying to build a cypher query that shows me connections between different node communities. Please find attached the picture that I am referring to. I have a graph with around 5000 nodes. The nodes that are connected via the the red edges are my "Supply Chain". Behind each of this 5 "root Nodes" are much more nodes that can be expanded. I want to find any node that is connected to an other "root Node". For example: (Second Screenshot) If there is a connection (green arrow), how can I get these via a Cypher query? Thanks for any help.