Dropdown menu on secondary menu

Hey NiekvdB,
Sorry for the late reply, unfortunately, your screenshot now leads to a 404 so we can’t see this, but from your description you would like your woocommerce sidebar category menu to show as a drop down menu, but I don’t see an easy way to do this other than using css to hide the child items until the parent has the hover event, Please try this code in the General Styling > Quick CSS field or in the WordPress > Customize > Additional CSS field:

.widget_product_categories li.cat-item-20.current-cat ul.children {
	display: none;
}
.widget_product_categories li.cat-item-20.current-cat:hover ul.children {
	display: block;
	border: solid 1px;
}

how it looks on-hover:

You can remove the border from the css if you wish.
Please note that the child items only show when you are on the page in the Private Content area.

Best regards,
Mike