Mixamo Can't Symmetric Rig and Weight Paint

Hi, I have the same problem. My model was created in Blender using the mirror modifier, so it's symmetrical. However, in Mixamo, the T-pose looks wrong, with one shoulder getting deformed. Other animations look fine or have only minor deformations. I've tried both applying and not applying the modifiers, but it doesn't make a difference. I also tried uploading just the body mesh by itself, but I still get one side that’s off. I've attempted to adjust the shoulders, but it always results in asymmetry. When i made a T-pose myself, all of the animations looked wrong the shoulders were kind of too low. Does anyone know a solution? How should the shoulders be modified to achieve symmetrical results in Mixamo?

looks out to me as well but it could be the camera angle... if you want to share the model i'll test it at my end

well without having the model to test we are just guessing but i would say the issue is you didn't make the model correct... i mean Mixamo can't make something "Symmetrical" it has to be that way to start with

Mixamo is rigging not weight mapping... For that you need a true modelling system like Blender or Iclone