My understanding is that the there are a couple of different issues with M1/Monterey (e.g., this thread). However, you seem to be using an older version of pymc (3.9.3), which is probably causing you to encounter some altogether different issues. As in that thread, I think the suggestion at this point is to transition to v4 with your new hardware. Installation instructions for the v4 beta are on the conda-forge site.
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