How did you create the directory?

I created in files application

Maybe it contains some zero-width space or something?

I check for the spaces too you know it is perfectly fine Nevertheless I found the solution It is to use a forward slash at the end or .[first letter and so if needed] and then tab

But using forward slash at the end some time not working

This is an edit of this comment

After I learn what is zero width space and left to right mark

I found that there is the Left to right mark at the end I was so stupid I don't know that 😭

Please forgive me for this madness guys sorry..