Where does one check for 32 or 64 bit android selection? Play store upload complaining.

The error window is:
Error
This release is not compliant with the Google Play 64-bit requirement

The following APKs or App Bundles are available to 64-bit devices, but they only have 32-bit native code: 1.

Include 64-bit and 32-bit native code in your app. Use the Android App Bundle publishing format to automatically ensure that each device architecture receives only the native code it needs. This avoids increasing the overall size of your app. Learn More

Where in Unity is this set up?
I have just developing and moving right along without taking this into consideration.
Thanks in advance.

 

Solved. IL2CPP selection and NDK r16 install.
IL2CPP also enables processor level debugging with a Qualcomm account.

https://developer.android.com/distribute/best-practices/develop/64-bit