No because they're in business to make money.
But considering how much demand there is for BBW escorts (a lot according to some posters in this thread), you or they should open an agency dedicated to BBW escorts and crush the game.
Correct if an agency had multiple call every day for bbw they would have some guaranteed!
I have done this in 5 cities around the world and the rooster of girl available at agencies does not change much in Toronto versus Vienna, Montreal, Barcelona, Lisbon or Geneva...
In Montreal, depending on the size of the agency you always have one to a few that are passed 30 year old. One to a few that are of color or asian. One to a few that were ex porn star or more pse with a lot of tatoos or curvier but no bbw.
At least for the past 10 years never saw one. BBW are all indy.
Toronto has much more diversity. Agencies have way more asian, black, indian.. (hence the reason I used to hobby in Toronto a lot!) More older girl also. But bbw I never recall.
In Europe about 5-6 years ago it was mainly thin east european girl everywhere. It changed a lot since. Now you have much more south-american girl, as many as east european girl. But bbw I never recall seeing one.
Let's be real it's not fat shaming. It's only offer and demand.
I spent some time with the 2 owner of a montreal agency (xo and euphoria) both confirmed to me the highest demand is for thin spinner type girl between 18 (a rarity) and 23.