Recently, I was testing Google https load balancer with query based parameter routing, after configuration, I found that I'm not able to activate IAP on any backend services except default backend , none of backend appeared in IAP.
For http, as per documentation, it's working fine but still no backend (except default)appeared in IAP.
https://cloud.google.com/load-balancing/docs/https/setting-up-query-and-header-routing
Does anyone face such issue? Any thoughts - I would appreciate. Thanks,adam