The repo does not make it clear, but Apple ships Linux builds of Rosetta 2 that can be used inside Linux VMs on apple silicon hardware [0]. With some patches (or so I'm told) it can be made to run on non-apple-silicon arm64 hardware.

Even if it's not fully decompiled yet, it should be possible to relink the decompiled subsections into an original binary.

[0]: https://developer.apple.com/documentation/virtualization/run...