The discussion is about suburbs, so by definition it is away from the city core.
Here in our (US, California) suburb it is wonderfully walkable for kids and adults alike. For kids, there is very little traffic since only local neighborhood traffic is present unlike in cities. There are bike/walk trails around and across. Multiple playgrounds, sports fields, all connected by bike trails. Stores, restaurants, school, assorted services, theaters, all within a ~10 minute walk radius. This is what suburb means to me.
Where are these magical subdivisions with city-like access to amenities?
If you are really interested in this type of living, look for newer master planned communities in the south. They are immensely popular and aforadable compared to coastal cities.
Sad stuff, the collapse of the public realm. Compound living is the only thing we can manage still.