The process to configure New Relic differs depending on the language used by your app.
To see the installation procedure for Grid or Dedicated Gen 3 projects, see the following pages:
For Dedicated Gen 2 projects, save your New Relic license key in a secure location on your Production environment and then open a support ticket, and we will configure it for you.
For more information on this feature, please see the following page in the Platform.sh documentation:
https://docs.platform.sh/increase-observability/integrate-observability/new-relic.html