did you try the vst3 plugin version?
on my mac i created a separate folder called OsTIrus inside the vst3 plugin folder and put the plugin and firmware file in it.
I did not test vst3 but in fact I managed to make this OsTIrus AU-plugin to work in Logic Pro X. So problem is probably with Numerology app. Anybody familiar with that? It's a great sequencer for nerds (maybe the best in terms what you can actually do with it) but it's not flawless. Probably there's something with Numerology vs. Sonoma or M1. As said earlier I could make it work in Numerology in my older Intel Mac with BigSur.