After completing our bus, we came back to the UK and found that they seem to do things very differently over here in terms of awnings. There's a tendency towards full awning rooms and inflatable 'air' awnings are very much in vogue.
The usual type is to have a straight channel rail attached to your vehicle, in which you thread the top part of the awning. Then you attach an air pump and blow up the inflatable leading edge of the awning and peg it in, like a tent. The whole process takes 10 mins. The biggest that I've found are 3mx3.9m and you can get extensions for either side to make the completed 'room' about 9m wide.
They aren't cheap, the base awning costs £850 ($1150 USD) and extensions are £320 ($425) each. Rail is cheap.
I've never seen this stuff in North America, even on the higher end trailers. Maybe I missed it? Maybe the weather just sucks a bit more over here, so we need more inside space.
, if you search for setup videos of the same product then you'll see the awning rail.