How to reduce apk with Android App Bundle and how to build for 64-bit requirement

I have 2 questions both of them about building xamarin forms app for android for google play console, I will ask in one post

1. I see in google play console that my apk would be smaller if I use Android App Bundle, is there an option in visual studio 2017 to do it? I also opened the apk with android studio and try to do it from there I couldn't make it

2. Get your apps ready for the 64-bit requirement - I did the check https://developer.android.com/distribute/best-practices/develop/64-bit
   I found the armeabi-v7a I don't have the arm64-v8a or x86_64, so I have 32-bit , how should I build for for 64-bit requirement , is there a way with visual studio 2017 ? what should I do?