Not your regular coach seating, but equivalent to US airline's FC or better seating, sometimes on longhaul even seats that convert to lie flat bed.

You won't see that in US or Canada (that I'm aware of), but are available in South America and Asia, possibly other continents.

OK, having typed that, Vonlane in Texas has this type of VIP bus, alas only domestic FC equivalent on a handful of Texas routes, including a ride attendant, for just a bit more than what it would cost to fly coach. Who knows, there may be others ....