My door stairwell is in a darker area of the home and at night in particular it is hard to glance at the lock to see if it is locked or unlocked. I don’t use the auto lock feature and with many kids going in and out most of the day, it isn’t always locked.
As a test I put a piece of small white tape (from label maker) on the edge of the dial. Now I can see in very low light.
I think having a small white or orange strip on the dial would help. My 2 cents.