My folder is not tracked by git

I have a folder FBA_Matting, i originally cloned the repo in the existing git repo and due to which i was unable to commit the folder.

So i deleted the FBA_Matting/.git but unfortunately the folder was not committed.

Then on my other PC, there was git repo containing all the code of FBA_Matting with some changes, So to avoid fatal: refusing to merge unrelated histories

So i copied the folder and pasted into my repository (checkout new branch, added FBA_Matting). Now I can’t see my folder back in git status command. So i tried to change the name from FBA_Matting to FBAMatting and now i can see it in git status

PS: I checked .gitignore Also, and there as no file containing FBA_Matting entry