ZSH: `ls *(.)` lists regular files only but `ls *(/)` does not list directories only

I suspect the problem is not the zsh globbing, but the ls default behavior, that when given a directory argument list the content of directory.

I suggest to try

ls -d -- <your-glob-here>

The best way to test your globs is with

printf '%s\n' <glob>

or

print -rC1 -- <glob>