You are asking how the HomePod mini works as a speaker for a mac?
They work terrific. The thread here is following the expectation that a stereo pair (2 x HomePods or 2 x HomePod minis) will be fully functional with an iMac or mac laptop. Current situation is that some applications can recognize the stereo pair for audio output, but not normal mac sound output. That is a very short explanation of an issue that is somewhat complicated to explain.
But to your specific question, you can certainly use the HomePod mini with your m1 Air. It works perfectly fine.