Hey, i got 571k on my mi 10 ultra, i dont think your phone is underperforming it is just that some benchmarks are made in best case scenarios as every little thing can affect the performance (root, installed applications, cpu and battery temperature, room temperature, storage capacity and many more). our scores match many other devices and your device can get these high scores if you set up the best case scenario for this. dont worry about that as your phone is performing exactly as expected and you will not feel difference if you compare to that phone with the high score. also sometimes using root you can make the phone output higher than it should and get those huge socres.