We want to connect Google Analytics 4 to our mobile applications (Android and iOS) All documentation that we found about this topic mentioned doing it through Firebase. We checked on GA4 documentation and they always mention using Firebase: https://support.google.com/analytics/answer/9304153#zippy=%2Cios-app-or-android-app
Do you know if it is feasible to connect a mobile application to Google Analytics 4 without using Firebase?