In Istio Ambient mode, when creating a Waypoint proxy and enrolling the namespace, the Telemetry emitted by the Waypoint is incomplete. Than can be observed in Kiali, not able to create a valid graph: 

Missing the green edges indicating http requests (L7 telemetry): 

The waypoint proxy emits telemetry, but many data is missing and from the emitted data, many fields are unknown. 

Some key queries used by Kiali that are missing: 

istio_request_total{reporter=~"waypoint|destination",destination_workload_namespace="bookinfo"}

Returning no results for the s390x:

Expected results: 

Just one result removing the reporter: 

Another query:

istio_request_total{reporter=~"waypoint|source",destination_workload_namespace="bookinfo"}

Returning limited results and many unknown fields: 

Expected data: 

Observed in s390x architecture in OCP 4.18, 4.19 and 4.20.