US escorts never come to MB.
Their preferred targets are the three big cities, and that's often part of a working vacation/change-of-scenery to a single city. A few years back there was some kind of crackdown in the USA associated with the closure of Backpage, some ladies talked about switching to Canada for touring, asked for advice too, however nothing really ever materialized.
Which is smart if they don't want to be banned from Canada, CBSA identifies young single ladies who enter Canada on a regular basis and may give them a shakedown one day, which they find degrading. Also the restrictions/hassles placed by Canada on visitors with DUIs - a lot of Americans have DUIs - makes the juice not worth the squeeze.