It's a great feature to speed up development.
Can we do this on C3 yet like in C2? Or is this yet to come?
So, basically, for now do I have to keep saving it out, rebuilding and deploying for every change?
Develop games in your browser. Powerful, performant & highly capable.
You can use remote preview. Not sure if it works on iOS though.
Remote Preview works on iOS 11+.
Apologies, I found the manual page a day later, although by accident whilst browsing something else!