Im using Blokada (downloaded from this website) on /e/ on my Fairphone 3 and I’m facing the same issue here as i was facing on a pure stable Lineage 17.1 on a OP3T.
Whenever I open the host log I get the message “no fliters configured”. I enabled a few lists and also tried to put facebook on the blacklist. But it did not work.
Generally if you are on v4 and on cellular data Blokada won’t download lists. You have to disable Download on wifi only in Blokada Ad blocking / Ad blocking settings.
Edit: check this paragraph:
Which Android version is Lineage 17 based on?
Can you please check Ad blocking / Ad blocking settings / List status on v4 and check how many rules are enabled?