TomcatReactiveWebServerFactory.getWebServer(HttpHandler) doesn't delegate to TomcatReactiveWebServerFactory.getTomcatWebServer(Tomcat) and instead creates the TomcatWebServer instance directly. This makes the javadoc for getTomcatWebServer(Tomcat) misleading:
Factory method called to create the TomcatWebServer. Subclasses can override this method to return a different TomcatWebServer or apply additional processing to the Tomcat server.