Back before COVID, the German intercity bus company Flixbus looked into the business side of bus+bike:
https://docplayer.net/104534988-Flix...e-tourism.html
Bottom line: this could be a competitive advantage and make money.
Fun fact: Flixbus recently purchased US intercity bus giant Greyhound.
....
In the photo below, our bikes are on the rack in front of the bus going across the Bay Bridge on the way to Amtrak station from Fisherman's Wharf bus stop.
A third cyclist was bummed that his bike had to ride in luggage below instead of on the rack. I think he was worried it would slide around during corners and braking.