Why isn't my mobile main menu functioning properly?

[yesi19]

When i was building my store  I noticed that my main menu links such as (home page, about us, shop now) were not working i didnt edit any code so im just wondering whats wrong and how can I fix it. here is my website if anyone can help https://elevaflow.co/

[yesi19]

it only doesnt work on my phone on my computer the main menu works fine