https://github.com/jenkinsci/monitoring-plugin/blob/78438d70b775219dee5f770bd3bdd7038a8f5598/src/main/java/net/bull/javamelody/NodesController.java#L162 is inline JS that would break with https://github.com/jenkinsci/jenkins/pull/11269

However, this page is currently broken:

Forcing during debugging does not set a content-type header, so raw HTML is displayed at least in mvn hpi:run.

In a normal (Docker) deployment, running

Jenkins.get().pluginManager.getPlugin('monitoring').plugin.filter.nodesCollector.lastJavaInformationsList.clear()
System.setProperty('javamelody.nodes-monitoring-disabled', "true") 

and then accessing e.g. http://localhost:8080/monitoring/nodes?part=graph&graph=buildsMeanTimes directly, will download the file.