The sole does end up slightly more worn than the right.
You should check this out with a doctor, you could be developing leg length discrepancy. It might be very slight right now if you haven't already noticed any obvious limp but if it's developing you may be able to catch the source of the issue early on. Could be a hip issue, scoliosis, something else. I don't want to make you worry about stuff, just something to check out.
I'm going through something similar right now, sort of started years ago with one of my shoes always wearing out before the other. And I always wore a backpack that would rub against the back of my shirts/jackets walking around. Never put two and two together, figured I just had a crappy backpack and crappy shoes but over time this morphed into a slight barely noticeable limp that turned into a more noticeable limp. Eventually that turned into a little bit of hip pain that kept getting worse. When I finally did see a doctor it turned out I developed leg length discrepancy due to osteoarthritis in my hip, apparently this hit me early on in life most people get something like that in their 60s-70s so I'm 20 years early. Going to get hip replacement surgery soon and get it fixed.
Hopefully you've got nothing like that but it's good to check.