Hi Suishii! Thanks for reaching out. My name is Princess. I'm an independent advisor. I'll be happy to help you out today.
This is a known issue for Logitech G Pro headset, left-right balance is not a feature that's available on this headset.
I would suggest contacting their support on Logitech official support website.
https://support.logi.com/hc/en-us/requests/new?...
I hope this helps. Feel free to ask back any questions and let me know how it goes.
Thank you!