I posted these thoughts on Reddit after laying in bed at 4 am, but I think it makes sense. Thoughts?
* L.A., NYC and London detailed Maps are already done and we should see them in one of the last betas. Apple simply released SF to show the capability and encourage developers to include Maps in more of their apps.
* Detailed road info and LookAround for the rest of the USA will be released at once with ios15. They are obviously tied together and again, Apple is simply waiting until the end of the beta cycle or iOS 15 public release to launch. The wide release of LookAround in recent country releases seems to make this plausible.
I certainly hope both are correct. Seems plausible.