Extracting HELP metadata and use as variable


I’ve seen this post https://grafana.com/blog/2020/06/15/how-we-made-working-with-prometheus-easier-with-metric-metadata-in-grafanas-explore-view/ and want to find out if it is possible for us to extract, for instance, HELP metadata as shown below.


Given this is what I have in Prometheus:

# HELP app_find_user_http_404_response Number of HTTP 404 responses
# TYPE app_find_user_http_404_response counter
app_find_user_http_404_response{title="Find User - HTTP 404 response"} 3

Then I would like to extract just Number of HTTP 404 responses from HELP and use it as a “variable”. e.g.: Graph X > General > Description = $help.