Using filters to target a particular category of Posts can be easily done with the URLs. For this, you merely need to add the following text after the link of the page – “#” + "category or tag slug".
Let’s say, if the content filter is set to categories, you will have to add the category slug.
Note: You can find the category slug by going to WP-Admin > Posts > Categories. Simply select the slug to see its name, slug, parent category, etc.
So in the above case, if I want to check out the Posts in the "Food" category, I will just add the category slug in front of the link. So the link to view all the posts in the "Food" category will be. “https://sitename.com/posts/#food".
Check out the Demo of Advanced Posts widget.