I’m trying to mirror the physics assets capsules from the right side of the body to the left side however it does not work at all. Sometimes they will be way off after mirroring. It’s very tedious trying to line them up and make it close to symmetrical.
Are you using ‘mirror bodies’ in the the physics asset tool? I’d start by checking and make sure your bones having proper naming conventions. (_L and _R or Left and Right etc)