Is Android version not support 60 fps? I feel laggy when playing.
It runs fine on my Samsung M23 (2.2 GHz) where it defaults to 60fps, but I will double check the framerate.
Before the latest update I optimised a lot of systems, to the point where I can get a web build to work. If you're able to connect a gamepad to your phone you can try the browser demo to see if it's just as slow (it runs just as fast on my phone).
Finally, can you post what phone you're using please? It might be a hardware issue. I can't promise I'll be able to fix it, but at the least I can let others know of potential issues.
There is no developer mode on Android (it would require more work than I can do in my spare time).
It detects a gamepad automatically, you will see a gamepad symbol on the title screen bottom-left. Something like a USB C cable might work (it works for me), or you would have to pair the gamepad wirelessly in your phone's settings - I recommend turning to the internet for advice on that one.