Can I somehow display the nested categories? First make a selection of categories that do not have a parent, and then make a selection in the categories to which it is the parent?
Go to add marker categories and create a new categories. Then create a new category and assign a category as a parent. This type you can create a parent child category.
Parent-child relationship is only show on a tabs, in listing below the map category-subcategory will not display.
Right now it's not possible in this plugin but customization is possible, its a paid service and please send us your all details of customization at email@example.com