How to rebuild libunity.so with new "Build-ID"

readelf -n unityLibrary/symbols/arm64-v8a/libunity.so |grep “Build ID”
Why the “Build ID” alway the same?
How to rebuild libunity.so with new “Build-ID”

If you’re using a variant where Unity uses prebuilt Unity - you can’t rebuild it. Unity does rebuild libunity.so when il2cpp + Strip Engine Code On is used.