Hello team, we have a website and a flutter mobile app the website push event to GA4 the app push events to firebase sometimes we have shared expirements that need to run on both the website and the app both of them uses the same APIs we are doing the experiment evaluation on the API level but the events are sent separately from the web and the app (we are using the same user_id when sending events) (each one send events to different big query) how can we have cross app/web testing and measurements thanks for your support

As long as the tracking key is the same

thanks a lot ❤️