Bug - Instrumentation doesn't work on Middleware

[bozzelliandrea]

In a middleware I'm trying to add a custom metric using

import { metrics } from "@opentelemetry/api";

const httpResponsesCounter = metrics
  .getMeter("test")
  .createCounter<{ status_code: number }>("test");

the opentelemetry configuration seems to be ignored and metrics return a NoopCounterMetric

if I add the same code in an api router it generate a CounterMetric and send signals through the collector