but it does exit in mydramalist database rn

https://mydramalist.com/29612-the-outlaws-2 

or maybe it was mentioned and released but I was not able to find it? 

It's still on "planning stage", it seems. The director has committed to making that sequel, but it's not clear if it's going to be made.

Source: https://www.hancinema.net/hancinema-s-news-sukku-son-considers-joining-the-outlaws-2-134886.html