Considering the huge amount of mobile traffic, I would propose to rethink the current concept of the mobile navigation.

Instead of vertically expand sub-menu items, I would propose to implement them horizontally. So clicking on a 1st level item in the menu, the submenu item could slide horizontally in. Would be a much smoother UX (Example: https://pasnormalstudios.com/).

Their mobile navigation is very modern and the concept is much more advanced than the one from Woodmart.

Thanks!