I would be worried about introducing another buck to a intact buck, as others are saying it might work it might not.
Heres a story about my experience with a pair of “bonded” rabbits
I got two 5 year old does because their owner died, they had to go together because they had all was lived together. they where all was on opposite sides of the cage, if one went to the same side as the other, the other would move to the opposite side. 6 months later one of them died at 6 years old, I expect to have a sad depressed rabbit because its friend died, nope she was suddenly active and happy, she was the most active I had ever see her. She died 1 month later. It makes me so sad to think that her happiest moments was when her “friend” had died, She had been kept with that “friend“ since she was born. Not all rabbits like company of other rabbits, they can be happy on their own, but some rabbits do, I have a pair of sisters who are all most all was together.