Submenu items not available on mobile

Publishing help Editor
1

I just discovered today that when viewing our site on mobile, the submenu items aren’t appearing under the main menu like they are on the desktop version of our site. I’m fairly new to Webflow, and can’t figure out how to address the mobile issue without impacting the menus across the whole site. Can anyone point me in the right direction?

https://preview.webflow.com/preview/potentialproject?utm_medium=preview_link&utm_source=designer&utm_content=potentialproject&preview=285fe1ea3f01017e24dd3b8707852892&pageId=6065b4eaf237da556aec401e&workflow=preview

Thanks!