Welcome, 4slimbu.
Yes, freeCodeCamp is still maintained. In fact, it is one of the most active repositories out there. You can view and contribute yourself: https://github.com/freeCodeCamp/freeCodeCamp
As for the backend, currently, I am working on fixing some of the miss-alignments that have occurred. Personally, I am not working on the projects, but am working my way through the Advanced Node and Express section.
Do keep in mind: the freeCodeCamp staff are a relatively small group, and the curriculum is undergoing some massive changes, which you can read about here: Help us build Version 7.0 of the freeCodeCamp curriculum
Hope this helps