Hi Mateus, I am Paulo and I'd like to help.
Is this happening to your wireless earphones/headphone? If so, some manufacturers lock down the left and right audio channels of their accessories to ensure consistent audio experience to users. This might be the reason why you're missing the Balance option in Windows. The good thing is you can unlock this by tweaking the Registry.
See the steps in this page
https://www.guidingtech.com/adjust-audio-balanc...).
(Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before downloading and installing it.)