With this article, the RAD Studio PM team is introducing an updated roadmap for Delphi, C++Builder and RAD Studio. This May 2019 roadmap includes plans for the next 12 months. Alongside, we have also published a May 2019 Roadmap PM Commentary blog post, with more details and information.
What is the status of C++ Builder for macOS x64?
Info on Android 64 for C++ Builder seems to be missing also
Please see the commentary blog post here: https://community.idera.com/developer-tools/b/blog/posts/may-2019-rad-studio-roadmap-commentary-from-product-management
looks like Goggle allowed an extension for Unity
If you are not ready why not try to negociate a delay with Google ? did you ask them ?