aravinth please stop asking this everywhere. I think we have already replied in multiple places and you will not get a different answer elsewhere.
The FriendsOfFlarum developer group which I'm a member of decided to remove that feature because it was too complicated to maintain. Therefore we are not planning to add it back in.
If you really need that feature, you will have to write it yourself or have someone do it for you. We are happy to help on this forum with specific development questions, but we have no way of giving an already ready solution.
I personally estimate this might take more than 1h for an experienced developer to implement and test, but I'm not very familiar with the Byobu codebase. And likely require more work down the line if you want to keep that forked version of Byobu up to date with the main version. We have a few developers that offer freelance services so you could contact them to get a quote for that feature. Though most developers already familiar with Byobu might have too bad memories of previous development to take on that task 😬