Yes this can be done, the tutorials depend on which networking API you plan to use. You’ll basically just going to make a networked multiplayer game, but the smartphone client will have a UI to send commands to the server instead of having a character represented in the game. You’re unlikely to find a tutorial specific to your use case, but you should be able to make almost any network API work for this kind of thing.
Though I haven’t progress that far into the network side of things. I’m still working on making the phone gyroscope and accelerometer as if it is 1:1 to the racket. do you know anything that could help ?