[PHP] SDK 3.2 - no performance data

Hello,

I am using sentry/sdk latest version, error reporting works fine, but I get no Performance data. I have Developer account at Sentry.io. Is there any bit I am missing in code or server setup?

Sentry\init([
   'dsn' => 'https://***@***.ingest.sentry.io/***',
   'traces_sample_rate' => 1 ]
);