Package an android build in 64 bit

Can anyone help?
I’m trying to upload my game to the google play store but it requires the apk to have 64-bit libraries and native code. Currently, my etc1 package only contains 32-bit libraries. I’ve followed this tutorial for converting from 32bit to 64bit but I can’t get it to work How To Bundle UE4 Project With Android Studio - YouTube

Is there a way of packaging the project as 64-bit apk so I can just upload it to google play?
Cheers in advance for any help