I received an answer to this question from the one of the library maintainers. The documentation on the website is, if not wrong, at least sub-optimal. The correct build line for a mac should be as follows, rather than the one on the website (as of 12.3.24).

./build.sh --config RelWithDebInfo --build_shared_lib --build_wheel --parallel --compile_no_warning_as_error --skip_submodule_sync --arm64