So will Apple users be able disable these ads in maps?

The nice thing about many of the native apps compared to their Google pendants is the absence of ads, with the glaring exception of the app store, which looks like a dumpster-fire. It is so disheartening to see the trend of shoving ads everywhere continue with Apple as well. I guess the profits are just too tempting to stick with idealistic UX decisions, if there was any of that left in the first place.

I would expect, much like the App Store, they will not. Their maps will give you directions to navigate the enshittification curve.