JavaFX needs to support MacOS systems that are using the ARM-based CPU's.
The required changes for this are very small, and come down to compiling with the appropriate flags (e.g. --target arm64-apple-macos11).

This requires XCode 12.2, while our current requirement is 11.3.

A first test indicates there are no source changes required for this, hence it can be considered to be a build issue only. 
There are at least 2 different build strategies:
* build 2 flavours of the SDKs/jmods and maven artifacts: one for x86_64 and one for arm64
* build a universal version for each library, so that only 1 version is needed. The drawback is that this results in bigger artifacts, although it only affects the native libraries.