Custom Metrics in Kibana

I couldn't find much on the internet that explained this. I followed the Custom Metrics page in the Elastic tutorials for using custom metrics with micrometer, but I was a bit confused how to use them in Kibana. Currently I can search for them in Dev Tools and in APM, but they do not show up as metrics that can be visualized.

Is this not currently supported? Is there something I need to manually customize to set this up to make dashboards?

I came across this post from last year that made it sound like you need to manually do stuff for custom metrics: Custom metrics via APM Java agent Micrometer integration are missing