Menu Links have letter spacing animation but I can't find the settings

Hello folks,

I’m working with a template and it has animated letter spacing on the mobile menu links. There is no way I can find to see the “current” green class since the menu links are to sections on a single page.

FYI it’s ONLY happening on the mobile menu. The desktop site is not animating the menu text.

Any help would be appreciated!

Here’s the link:

Here is my public share link: LINK
(how to access public share link)