Performance monitoring is not working in sentry-expo

I want to set up Performance monitoring for my react native app. I have used the below code in app.js.

import * as Sentry from 'sentry-expo'

    dsn: config.sentry,
    enableInExpoDevelopment: true,
    integrations: [
        new Sentry.Native.ReactNativeTracing({
          tracingOrigins: ['localhost', '', /^\//, /^http:\/\//],
    tracesSampleRate: 1.0

This is my sentry-expo version

"sentry-expo": "^4.0.5",

Still, it is not working. Can anyone help me out? Thanks.