I had hallux rigidus, similar to bunion but the bone growth in on the top of the toe, not the side. Had surgery on both, not at the same time though. Extra bone whacked off down the joint and metal plate black and deckered on. Horrid surgery, toe looked like a huge sausage sewed up with saddlers twine, bloody painful and I had to wear a shoe thingy that tipped the foot back so I didn’t put weight on the toe metal work.
The end result is brilliant, big toes are rigid but I don’t notice, the scar has faded to nothing, I would do it again if I had any more big toes!
Think bunion surgery would be similar.