Hi. I have a MacBook Air M1 and just purchased the ioStation 24C yesterday. It does work for the most part, but from time to time it seems to stop responding to my input on the unit (although it does then still register and adjust to changes made in the DAW). When I switch it on and off, it seems to fix it.
I'm still a new Studio One user, so I may not have it configured correctly. Also note that with limited ports on the M1 the ioSation is plugged into a dongle via USB-A (my other USB-C port is for my external drive), so that may be a contributing factor as well.