I’m not 100% sure I understand the problem, but you can just do all the rigging on one eye entirely and copy all the art/rigging to the other eye. About minute 36 in this video shows how to do that. https://youtu.be/NdU4aZOu-cA
Make sure when you reimported the psd you added art mesh to any new pieces too 🙂
this video was so beefy my pc kept spazzing out QAQ
welcome to my beginner friendly step-by-step guide on how to set up your psd in live 2d and rigging the eyes! i made it in a way so that you could follow along while you rig your own vtuber model file from scratch :D and please turn on captions if you can't understand me because i tend to mum...