It is advised to wait 6-8 weeks after the second rabbit is neutered because they still hormonal a few weeks after their testicles were removed.
I can tell I've tried bonding two times two different rabbits 6-8 weeks after neutering and both times it was too early. With first rabbit 8 weeks after neutering first session went well but after that he kept humping and spraying and girl didn't like it so they had a little tornado fight. I separated them immediately and waited one more month, then they bonded easily, they are a very beautiful pair and 5 months together now.
The other one is a very relaxed rabbit and I tried when it was 6 weeks after neutering but when he saw girl he changed completely and kept chasing her so I had to separate them as well. I will try again one month later, they generally liked each other and they have similar interests so I hope they can bond, they both are very nice rabbits.
By the way, I don't want to disappoint you but there's no guarantee that your rabbits will bond. It is promising that they are showing signs but they say it is easier to bond male to female, both neutered, then two males. But I've seen some success stories here as well so fingers crossed.
For now I would recommend to do some research on bonding rabbits, there's plenty of videos on youtube and if you use search on this site too, it would help you to avoid some common mistakes. First of all you should find/create a neutral territory, new to both rabbits, otherwise they can imagine that it is their territory and the other rabbit is an invader so it can lead to fight. Even your rabbits look so cute but every male rabbit is very serious about their territory.
Sometimes bonding is really easy hope it will be easy for you, but sometimes two rabbits are just uncompatible for some reason and it is hard to predict really.
