In this section, we will discuss setting the category widgets to the KB listing page.
First of all, set the sidebar layout of your choice via Dashboard >> Appearance >> Customize >> Site Sidebar >> Sidebar Layout. Here we will move forward with the left sidebar layout.
Moving forward and setting the relevant widget inside the left sidebar. For this purpose, move to the Dashboard >> Appearance >> Widget section.
Select the knowx categories or collapsing categories widget from the left and set it inside the left sidebar at the right.
You are all done, now check the Knowledge base.