Here is the full list of all 21 KART CHASER: THE BOOST VR achievements.
Promoted to Gold license
Promoted to Platinum license
Promoted to Diamond license
Promoted to Master license
Promoted to Challenger license
Activate booster zone for 500 times
Used drift booster for the first time
Promoted to Silver license
Achieved 1st place
Earn 100000 Credits
Achieved 1st place for 100 times
Fire missiles for 200 times
Use turtle items for 200 times
Use nitro items for 200 times
Use ice-ball items for 200 times
Use banana items for 200 times
Use warp items for 200 times
Use thunder items for 200 times
Use time-bomb times for 200 times
Use dragon items for 200 times
Own all karts