If you use Facebook, Instagram, LinkdIn or any other social app/site, you might see ads are not filtered.
Advertisements on different social sites are usually provided from the same source from where you access the content you want to see. An ad blocker like Blokada cannot distinguish what is the wanted and unwanted content. It is due to the technology our app uses to block ads: it filters hostname resolution and cannot decide if that is used for advertisement or to provide real content.
If you are interested how Blokada works please refer to the following article: Intro to adblocking with Blokada.