The "create runtime template" UI does not give the user any indication about what is wrong if their subnetwork does not have Private Google Access enabled.

[ojarjur]

Dataproc Serverless Sessions require Private Google Access to be enabled on the subnetwork they use.

Accordingly, the UI provided by the plugin for creating a runtime template filters out any subnetworks that do not have this enabled, but it does not give the user any indication as to why they are being filtered, or even the fact that they are filtered out.

It would be much better from a usability standpoint if the user saw that the subnetwork was found but is not supported, and it would be even better from a discoverability perspective if there was some sort of message indicating why it was not supported.