[firebase_analytics] Getting conversions in Firebase as "Direct" instead of "Paid Search"

[joshipucher]

Hello.

I am successfully getting conversions from events in firebase analytics by using the "logEvent" function from firebase_analytics:

static FirebaseAnalytics analytics = FirebaseAnalytics.instance;
await analytics.logEvent(name: "owner_paidtest");

only 10% of these conversions are marked as "Paid Search" or "Organic Search", all others are marked as "Direct", which is unrealistic. Because I know that around 80% of my users come from the Google Ads to my website.

The problem with this is, that I only get a few conversions sent to Google Ads (only those that are marked as "Paid Search").

I was in contact with google support for a long time. Now they sent me those links, which they think this could help with my issue:
https://firebase.google.com/codelabs/GA4F_Webview#1
https://firebase.google.com/docs/analytics/webview?hl=en&platform=ios

Is this true, that I still have to code something in native language, even though I use flutter and the firebase_analytics dependency?

Maybe somebody have an idea what may be the problem here?

Thank you