What I dont like about instant guard is that, in order for it to work, you also need to install Asus router app. Is ok on my phone, macbook... fine i'll install asus router app even though I'll never use it. but installing in on every member of my family and giving them ability to login to router... I don't think so.
You might be able to uninstall router app once Instant guard is up and running, but still....
Sorry for the rant. I like the idea and really want it to work, but don't like the implementation. But yes you can install app on M1 macs, but don't know if it is going to work a I didn't try it out as I did not wanted to install router as as well.