I'm thinking of participating in this Jam for the first time but...

Not sure if I can *properly* export to the required Mac OS - will I be able to enable notarization and code signing? I'm still looking into if that's possible. 

Are both a requirement? How big of a problem would it be if I didn't enable notarization / Code signing? The Godot exporter has a warning saying the project will be blocked by Gatekeeper without both.

Is Gatekeeper something the judges can just bypass, like those warnings I get in windows when downloading an uncommon .exe files?

(I would export to HTML5 but my planned game really needs a few things WebGL2.0 just doesn't support).