It’s mentioned as an iOS 15 feature, so best case scenario is this Fall for all of the USA.
Only SF, LA and NYC will have the additional POI/elevation/tree details.
But detailed street info like crosswalks, bike lanes, 3D highway interchange is all part of the general release according to the iOS 15 feature page.
And as I stated earlier, I also think they will release LookAround for the rest of the US at the same time.
What I’m wondering is if other updated countries will also get the detailed road info at the same time.
Makes sense...the "detailed streets" info is probably taken from the vehicles/Look Around footage. Not too much manual curating is probably necessary.
Then again...for those on the iOS 15 beta, it's currently limited to just San Francisco at the moment....