Just tested this. Seems to run fine on my mac. Godot is supposed to support M1 but I honestly don't know anything about developing for mac so I can't say for sure. If I find anything I'll make an update
You need to sign the app with an Apple developer account (which costs a $100/year) for it to run on other peoples devices. You know, just the apple way of doing things.
There is a workaround tough, open the terminal and type xattr -cr {path to the app}, and it will bypass the “protection”. The next time you try to open the app it should work.