Mobile Main Menu Navigation Not Showing Up

Store Design
2

Hello
Add this css in your css file.
Online Store->Theme->Edit code->Assets->theme.scss.liquid

@media (max-width: 1079px){
span.navigation-toggle.navigation-toggle-close {
    display: block;
}
.navigation-toggle-close {
    left: -37px;
    right: initial;
}
}