Reply To: Accessing Event Data with Custom Properties in GA4

[William]

The issue likely lies in how your custom event parameter is interpreted by GA4 – it’s possible that “event_params.app_version” isn’t defined as a dimension in GA4. You might need to manually configure it in GA4 as a custom dimension first before using it in the JAVA library. Try defining app_version as a custom dimension in your GA4 dashboard, relaunch your app, then you should be able to access it as expected.