Hello,

1) Please try adding the following Custom CSS in the Custom CSS for Desktop area under Theme Settings >> Custom CSS.

.woodmart-navigation .category-icon {
    top: 10px;
    position: absolute;
}

2) I have visited your website and icons are displaying with the subcategories. It seems that you managed to add icons as required.

3) If you want to display the categories in the page title then you can enable them from Theme Settings >> Shop >> Sidebar and page title.

Screenshot for Clarification: https://prnt.sc/10s8ieh

Best Regards