The NSA does not sign Ghidra binaries, and has no plans to do so. Instead, they suggest that you install a build enviroment and rebuild these components from source.
Ghidra already ships with all required binaries for Intel macOS, so we can simply remove them from quarantine instead of replacing them. This will not work on aarch64 (M1 or A-series), for which you will need to do a rebuild.
For new installs using brew: