Build 64 bit for android

hello can someone please tell me how I can build instead of 32 bit 64bit? Would like to update my app in google store, but since August 1 it must be 64 bit but unfortunately I do not know how to build 64 bit. I hope someone can help with that.

Unity version 2019.1
Regards,
Hasan

In your Build Settings change Build System to Gradle. Also check Build App Bundle.

Next go to Player Settings - Other Settings and select IL2CPP under Scripting Backend. Now you can check the boxes ARM64 below.