most bumpers on pups, are very flimsy and so are the welds.
you could see if a welder could weld and brace a receiver for a bike rack. but doing that may void the frame warranty.
it does on ultra-lite travel trailers.
why don't you get a Yakima or Thule roof rack. that's unused space up there and gives you the ability to carry other things, like kayaks, cargo, skis, snowboards and so on.