I suggest you don't even think about uninstalling it. After uninstalling, the hardware will lack drivers, and your mobile phone system will crash, so Lenovo did not give users this right.
U Health is not in the default first interface, but slides to the right in the default interface to hide the first interface, which does not affect the usage habits.
If you want to remove this function and close this interface, then you have to find a great god to customize and modify a system for you.