Hi. The easiest way is just to use CSS

@media (max-width: 992px) {
    .sp-megamenu-parent {
        display: none;
    }
}

But it seems that your template has been customized and this was not done correctly. Since this should work from the box just as you want.

I suppose that the classes in the HTML code of the template were changed and/or template.css was edited, which is not recommended to do.

Better to deal with this. Otherwise, it can lead to unpredictable consequences.

Hi

Thanks for contacting us. You can follow Pavel's instructions. And thanks Pavel for sharing the solution.

-Regards.