And as far as I can tell Apple completely changed this in iOS15 and now Maps takes its mode from the system-wide light/dark mode setting with no way to override it.
I'm happy for people who like Maps in dark mode but personally I really prefer light mode for map readability despite using dark mode for absolutely everything else. I got away with it up till now because I always used Google Maps instead of Apple Maps but I quite like what I'm seeing with the Apple Maps improvements in iOS 15 to the extent that I would seriously consider switching were it not for the fact that as far as I can tell there is now no way to override my global dark mode setting to get Apple Maps back into light mode.
Have I missed a setting somewhere in the new iOS15 Maps app or do other people see the same thing, i.e. Maps now will only follow the system-wide light/dark mode setting with no way to override it?