Metric exporter not adding http routes or path to metrics

I'm running a Flask application and I tried enabling metrics using "export OTEL_METRICS_EXPORTER=otlp_proto_grpc". This works fine but the output could be more useful if it included the urls being hit. I only see http_host="localhost:5000",http_method="GET" instead of something like localhost:5000/login.

I started a slack question on the topic here:
https://cloud-native.slack.com/archives/C01PD4HUVBL/p1678719030193089

Aaron Abbott wrote "so http.route is "conditionally required". I think we should update the instrumentations to add it if available"

OTel Instrumentations
opentelemetry-instrumentation==0.37b0
opentelemetry-instrumentation-dbapi==0.37b0
opentelemetry-instrumentation-flask==0.37b0
opentelemetry-instrumentation-jinja2==0.37b0
opentelemetry-instrumentation-requests==0.37b0
opentelemetry-instrumentation-sqlite3==0.37b0
opentelemetry-instrumentation-wsgi==0.37b0

Partial Prometheus output

HELP http_server_active_requests measures the number of concurrent HTTP requests that are currently in-flight

TYPE http_server_active_requests gauge

http_server_active_requests{http_flavor="1.1",http_host="localhost:5000",http_method="GET",http_scheme="http",http_server_name="127.0.0.1",job="demo-flask",service_name="demo-flask",telemetry_auto_version="0.37b0",telemetry_sdk_language="python",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.16.0"} 0 1678718765640
http_server_active_requests{http_flavor="1.1",http_host="localhost:5000",http_method="POST",http_scheme="http",http_server_name="127.0.0.1",job="demo-flask",service_name="demo-flask",telemetry_auto_version="0.37b0",telemetry_sdk_language="python",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.16.0"} 0 1678718765640

HELP http_server_duration measures the duration of the inbound HTTP request

TYPE http_server_duration histogram

http_server_duration_bucket{http_flavor="1.1",http_host="localhost:5000",http_method="GET",http_scheme="http",http_server_name="127.0.0.1",http_status_code="200",job="demo-flask",net_host_port="5000",service_name="demo-flask",telemetry_auto_version="0.37b0",telemetry_sdk_language="python",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.16.0",le="0"} 0 1678718765640
http_server_duration_bucket{http_flavor="1.1",http_host="localhost:5000",http_method="GET",http_scheme="http",http_server_name="127.0.0.1",http_status_code="200",job="demo-flask",net_host_port="5000",service_name="demo-flask",telemetry_auto_version="0.37b0",telemetry_sdk_language="python",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.16.0",le="5"} 9 1678718765640
http_server_duration_bucket{http_flavor="1.1",http_host="localhost:5000",http_method="GET",http_scheme="http",http_server_name="127.0.0.1",http_status_code="200",job="demo-flask",net_host_port="5000",service_name="demo-flask",telemetry_auto_version="0.37b0",telemetry_sdk_language="python",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.16.0",le="10"} 11 1678718765640
http_server_duration_bucket{http_flavor="1.1",http_host="localhost:5000",http_method="GET",http_scheme="http",http_server_name="127.0.0.1",http_status_code="200",job="demo-flask",net_host_port="5000",service_name="demo-flask",telemetry_auto_version="0.37b0",telemetry_sdk_language="python",telemetry_sdk_name="opentelemetry",telemetry_sdk_version="1.16.0",le="25"} 11 1678718765640

Start with the Flask instrumentation and reproduce the reported metrics using routes such as /login. Compare the generated Prometheus labels with the provided output and verify that the applicable HTTP route or path is included when available.