Why hasn't Waze, Google Maps, or Apple Maps integrated weather overlays?

Apple acquired darksky weather app last year so they have a weather backend

https://www.theapplepost.com/2020/04/01/apple-acquires-popul...

https://maps.darksky.net/@temperature,2021-2-13,18,-32.328,1...

I’m not sure what you mean specifically but if you zoom to a reasonably small area in Apple Maps it does show the current weather conditions for that area, in the bottom right corner.

Is the weather data supplied as open source, with a requirement that any products that uses it must be similarly open??? A lot of this data comes from NASA. If this is the case, any map maker with a fee basis might not want to give their work product away with that sort of strings on it??