eGPUs don't work with Apple Silicon Macs, only Intel. We ran into a lot of the limitations early on, and this is the only reason we still have 2018 Mac Minis and 2019 Mac Book Pros.
You can imagine our confusion and surprise when we got our first M1s and had to lose a few displays and our eGPUs.
Apple made a strange choice with their hardware that effectively pushed our development to Linux and Windows. If Macs didn't make such nice front ends, they almost wouldn't have a place at all.