I want to add items to the default shop sidebar (the menu) like in your demo (filter by price, latest products and so on) but I do not find where to add this. If I use the shop sidebar widget, all my categories disappear from the sidebar.
1. Can I add items to the default sidebar? How?
2. If I need to use the shop sidebar widget, how do I get my categories with accordion function in this as well?
You need use Woocommerce Product Categories, Price Filter widgets in Appearance > Widgets and drag them into “Shop Sidebar” area.
Make sure you selected “Shop Sidebar” in “Widget Area” for your Shop page in Pages > Shop > “Page Layout” box on the right side.