The following criteria must be met in order to effectively use this feature:

• A Route10 must be installed and on the latest firmware
• The Route10 must be directly connected to the Starlink modem
• The Starlink modem must not be in bypass mode

It is, in theory, possible to still obtain telemetry if the Starlink modem is in bypass mode. This would require creating a static route for the Route10 pointing to the IP of the Starlink modem as well as an inverse static route on the Starlink modem side.
This has not been tested and is not officially supported. Please see this article on how to create a static route on the Route10