You can just do both.
FWIW, I would assume that a native Android app will run smoother than a WebGL build. On the other hand, the process of sideloading an APK from itch.io is a pain and will only become worse in the future due to new restrictions in the Android OS.
If mobile platforms are your main target, I personally would advise getting your game on Google Play and suck up the one-time cost for registering with them.