If you suspect that Blokada blocks less advertisements than earlier, please refresh your lists. To do it,
- open Blokada's settings by swiping up
- tap on Ad blocking
- choose Ad blocking settings at the bottom of the screen
- choose Download lists now
Usually it happens because new servers are added to the existing ones that are not (yet) identified and added to the blacklists, or the new list is not downloaded to your phone, therefore they are not (yet) blocked.
Alternatively you can enable more host lists or add more restrictive filters in the Blacklist menu.
Please note that Blokada uses 3rd party lists, therefore if the app itself worked earlier and blocked ads, without changes it should behave the same way.