The color contrast of the Maps display is very poor when iOS Dark Mode is enabled. A friend sent me a location pin, I tapped into it, and I can hardly see the roads in the map (screenshot attached).
There needs to be higher contrast between the road and the background when using dark mode.
View attachment 950645
This is a complaint I understand...but then really don't. Hit "directions" and the route you need to follow will be highlighted, the phone/CarPlay will tell you where to go/when to turn. The whole point of dark mode (especially Maps in this mode) is to not show distracting brighter lines that have no effect on the route you are taking. And the assumption is that you are actually IN darkness, so your eyes/pupils should be adjusted to see the lower contrast better.
It was WORSE last year when dark mode was first introduced and they made a significant change to the contrast level in Maps in particular based on the initial complaints (during the initial beta). I think it's just one of those things that you're either okay with or you're not. It's a rare complaint (if at all) since the change...at least in the main Maps thread.