[RUM] Mobile Vitals and application_start missing on Android

[wtfdiov]

Question

Environment Details:

Datadog SDK Version: 3.1.2

React Native Version: 0.81.5

Expo SDK: 54

Platform(s) affected: Android (iOS is working as expected)

Issue Description:
We are seeing a discrepancy in Mobile Vitals reporting between iOS and Android. While iOS reports vitals correctly using the latest SDK, Android does not report any vitals.

Furthermore, Android is not reporting the legacy application_start event, which is critical for our performance monitoring.

Steps Taken:

Confirmed that the SDK is initialized correctly on the Android side.

Verified that other RUM events (actions, views, errors) are being sent successfully from Android.

Questions for Support:

Is the lack of application_start on Android a known bug in the current React Native SDK version, or is there a specific configuration required to bridge this?

I understand that the "Vitals" feature is currently marked as "Coming Soon" for React Native; is there a timeline for when Android will achieve parity with the iOS vitals reporting?