The maximum number of nodes that you see in the relationship graph depends on the

graph_maxnode

parameter that you configure in the properties file of the relationship graph user interface. Default is 500.

The relationship graph can display only the configured number of nodes even if a record returns more nodes than the configured number of nodes.

To increase the maximum number of nodes that you want to view in the relationship graph, perform the following tasks:

In the properties file of the relationship graph user interface, increase the
graph_maxnode
parameter value.
Regenerate the relationship graph user interface WAR file.
Deploy the generated WAR file on the Tomcat container.