Posts Loop + Sticky post feature

Hi. We have the following setup for our categories https://imgur.com/a/pDNJ9of As you can see it’s pretty default. We want to keep a couple of posts on top of a specific category and it’s subcategories, to do so, We’re trying to use the “Sticky post feature” but it seems to do nothing. We know there was a “Feature” category available with the themes default settings which might’ve kept the posts on top of the category list, but we imported all the categories and content and in the process, the “Feature” category disappeared. Do you have any suggestion to keep those posts on top of the list? Thanks