Just because theyre bonded doesnt mean they wont fight in the future. Keep them how they are for now, until your youngest is neutered
My first two were unaltered for about 2 months together and were fine free roaming together. Blue hit puberty and began nipping and mounting on occasion, but he quickly stopped that when i told him repeatedly that it made me sad (hes my trained emotional support rabbit; he doesnt like when im sad). We had him neutered soon after that. Bombur had to wait a while though due to testicle problems. And he got aggressive. He would start with small nips and over the course of 2 months progressed to mounting, biting (blood), fur pulling, boxing/hard kicking, ect. They had to be separated after Bombur ripped chunks of Blue’s fur out (it was a very short lived fight [few seconds], we had the spare cage set up already and planned to add him to it that night). We had to rebond them after Bombur was neutered, and luckily, Blue didnt hold a grudge against him so bonding went pretty smoothly. However, our third rabbit, Badger, who saw it happen but didnt participate is still very cautious and nervous around Bombur
So theres my personal reason for advising you to keep your two separated until all hormones are out of the picture