Firebase iOS first_open event not showing up

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Hi, we have react native app integrated with Google Analytics (GA4) & Firebase. I used @react-native-firebase/analytics  and @react-native-firebase/app packages. We want to use google adds but iOS events not showing up in the google ads. 

I created new event for ios project. It's name is "first_open_ios" and matching condition is "eventName equals first_open". I cannot see this event in the events page in the firebase. So i cannot make this event "mark as conversion".