I am trying to build my game for 64 bit architecture as per Google guideline I upgrade the unity to supported LTS version 2018 and change the scripting backend to IL2CPP
Try to build the App without the x86-Architecture.
Otherwise your settings look fine.
Also you can try to export the project (instead of building the app bundle) and build the APK using Android Studio.
I successfully published to Google Play today with Unity 2019.2 after many attempts.
uncheck 86 architecture
uncheck the experimental split apks
export the the project and open in Android Studio
Update everything in Android studio in order for the bundle package (aab) format to work in Google Play.
create a signed app bundle -> successfully published with no 64-bit requirement error.