You can see the Github issue covering this here: https://github.com/Clozure/ccl/issues/356

There was quite a bit of discussion about this a couple of years ago. OpusModus[1] investigated supporting CCL on M1, but wasn't confident that it could be accomplished, and instead ported their product to LispWorks.

1. https://opusmodus.com

That effort is somewhere between stalled and dead. Matt Emerson was funded to work on it, but that funding fell through a few months ago. I made him an offer to resume the work but he hasn't accepted it and hasn't said why. So unless there is someone else out there who is capable of doing this, it's not looking good.

I didn’t think an Apple Silicon port would ever happen.

I would love to be wrong about that!