That's a good little step. Don't expect too much to soon. If a rabbit doesn't have trust for people (for example if they haven't been humanised at all before coming to you) then it will take a long time for them to build trust. Don't expect it to happen quickly, and don't be demoralised if it takes a long time, months to years. Your bunnies are not unhappy, they will probably love the human attention when they get trust for it, but right now, they seem very comfortable there. Most likely, you want to bond to them for you, and that will take longer than if they bond to you naturally, so please don't give up on them when it doesn't happen quickly. Rabbits are prey animals so take a long time to trust something that they do not see as trustworthy.