Well, if you use big “aggressive” lists, you’ll find that it blocks a lot including stuff you actually do want to see, then you have to comb through the recently blocked list and whitelist that which you actually need.
OR, you only use the oisd.nl list, which is supposed to keep everything you do wish to use in a working state. I have used it for years now I have yet to whitelist something. Once a year I update the pihole, but otherwise don’t touch it.