Hi, Neon uses public root certificates issues by Let’s Encrypt. Check out this documentation for some of the locations where you might find them. The location differs by operating system / distribution:
Let us know how you make out. I took a quick look at NewRelic and it looked as though it requires installing an agent. With Neon being a cloud-hosted service, you would not have direct access to the the Neon host operating system to install an agent.