Definitely possible in principle, but I’d first make sure the rattle is actually the bearing — check the impeller for dirt/imbalance, loose housing parts and anything touching the fan.
If it is the bearing, difficulty really depends on whether Vevor designed the motor to be serviceable. Some EC motors are pretty sealed up and getting to the bearings can be more trouble than it’s worth.
If you open it, disconnect it completely from mains first and get the bearing number/dimensions from the existing bearing before ordering anything. If it’s still under warranty, I’d contact Vevor before opening the motor.