AppSealing checks uploaded apk`s Firebase and Crashlytics package, and configure compatibility to send crash report properly.
But when uploaded apk does not have Crashlytics package, AppSealing cannot setup compatibility and you cannot get crash reports.
If you are using Proguard or R8 build options to obfuscate your apk, you need to set below packages not modified by them.
These rules should be included in your proguard-rules.pro file.
-keep class com.google.firebase.crashlytics.** {*;}
-keep interface com.google.firebase.crashlytics.** {*;}