Thanks for contacting us and choosing our product!
Now WooCommerce widgets don’t have options to select from one category.
In this case we have a solution for you.
Please follow the section Menu in our document here: https://document.harutheme.com/pangja/ https://prnt.sc/10z1wsa
and use this shortcode as example: [haru_products_slider products_per_slide="3" autoplay="false" per_page="5" category="calendars"]
Hope this helps!