I have 2021 C400X (euro5) with 14 000 km. So far just one issue in 1000 km with vibrations in turns. Solved by my dealership https://www.bmw-scooters.com/index.php?threads/vibration-when-turning-and-resonance.2169/page-2#post-22611
Now I am about to change the tires for the firstime.