However, if you enjoy the sense of progression and want to compete in official leaderboards, sticking to the official version is always the better move.
CarX Technologies has a strict anti-cheat system. Using a modded version online (in "Showdown" or "Network" modes) will likely get your account permanently banned.
You’ll need to provide an Apple ID to sign the app (it’s recommended to use a "burner" or secondary Apple ID for safety).