I notice that I am not alone with the issue (Beats in elastic-agent reporting "failed to connect to backoff" - #5 by trudyc)
I am trying to find the correct way to specify it in the helm values, but the documentation is not quite clear where to put it, I am looking at https://github.com/elastic/cloud-on-k8s/blob/main/deploy/eck-stack/charts/eck-fleet-server/values.yaml but cannot seem to find any ssl.certificate_authorities key to write it to...