Going to 4S will depend on the ESC & prop. If the ESC is capable of handling the voltage and the prop will not overstrain the motor then it’s possible.
Start with an ESC that you know can operate on 4S. Then test the prop, best to start small. On the ground, run it full throttle for 10 seconds, stop it and check the temperature, by touching the motor, ESC & battery. Warm is OK, but if the as so hot you can’t hold then, stop, the prop is too big. If it passes, try a 30 second run. If it passes, try a 60 second run. If it passes, you can try a larger prop. If anything gets too hot try a smaller prop.
It’s always a good practice to test the temperature of everything after a flight, a prop that worked when it 70 may overheat when it 95+.