Noga K. Got it. I don't understand your problem though. When a user hits Mixpanel, they would be assigned an anonymous ID. As soon as you have organization_user_id, call idnetify on it. And when you have account_user_id, set it as a user property.
Simon D. This shouldn't ideally happen. Can you send a screenshot of the report in GA4 vs Mixpanel?
I suppose you're looking at 2 different things across the tools.
Ashton C. No, that's not the case. Attribution works very differently.
It depends on the model you choose, and metrics you choose. Can you tell me what you're trying to do, and based on that, I can help you understand what the report means.