What computer operating system?
Nonetheless, the Premiere Elements 14/14.1 Windows Titler has no options for kerning and leading.
You need to go back to at least Premiere Elements 10 Windows to see an option for kerning and leader in the Titler.
Add On...This is not Adobe. Rather essentially a user to user forum. Consider filing an Adobe Feature Request Bug Report Form to make your Premiere Elements features comments known to Adobe. Feature Request/Bug Report Form