As per UCP documentation, external_route values use
sni:// protocols for external URL domain values. When creating a service via the UI, you may notice that SNI external routes are instead set to use the
https:// protocol instead. This is not an issue as the service labels set by UCP's user interface using the
https:// protocol for the external route is identical to those created via the command line or APIs using the
When deploying services to UCP via the command line or via the API instead, it is still recommended that you use the service labels documented in the Docker docs.