I've recently upgraded our Elastic Cloud cluster to 6.4.0 but i still don't get the APM UI in Kibana.
I have sent APM data to the cluster and can see it in the individual dashboards that come with apm-server.
I could not see anywhere to turn the APM UI app on in Kibana.
Update: I've realised that it only upgraded Elastic Search to 6.4.0, Kibana is still version 6.3.2. I'm not sure if this is expected.
Update 2': I raised a support ticket and now i was able to upgrade Kibana to 6.4.0. After upgrading, i can't see APM in left menu (tried logging out and even to log from another browser) but can go directly to APM app but changing URL to "app/apm#" and can now access the APM UI in 6.4.0.