Oops, I am sorry that we bumped into some problems while trying to support Apple Silicon natively with Devmate, and therefore we will need time before the recompiled version could be delivered. As we cannot figure out when our activation process will work on Apple silicon, I cannot give you a clear time.
The current Intel-x86 version of MarginNote runs great on the M1 Macs. The performance is wonderful, and due to the fact that x86 is not a real-time translation but rather recompiling the file, you won't have to worry too much about the performance. I am using a M1 MacBook Ai, and MarginNote 3 runs great.