I've just received new Galaxy buds as a gift and right out of the box the left bud is noticeably louder then the right. I've tested the buds on Windows 10, Android 9, and Ubuntu with the same issue occurring. Though on Windows, I get two audio outputs to choice from.
"Headset (Galaxy Buds (9E22) Hands-Free AG Audio)"
"Headphones (Galaxy Buds (9E22) Stereo)"
The stereo option has the audio imbalance issue, but the AG audio doesn't. Though the audio quality is extremely poor using the AG audio option.
I've done research about this issue and while it appears others have ran into this, none of the solutions have either worked or are relevant. There's nothing clogging the buds since the issue was present right out of the box and the AG output option doesn't have this issue. I've tried resetting multiple times in the Galaxy Wearable app. Tried letting the buds die, then recharge. Tried removing the buds from my devices and redoing the setup. A comment suggested using the "Find My Earbuds" option to rebalance the buds, though still nothing changed.
I've already updated the firmware to the latest version R170XXU0ATF2. All my devices it connects to are up to date and other bluetooth headphones haven't had this issue.