For people not understanding how it works: you can set a CNAME entry on your tracker.domain.tld to bypass all Browser's third-party tracking preventions, and make it look like it's a normal subdomain of your website.
You need to make a CNAME tracker database manually by resolving the reverse entries for known IPs. Usually there is hundreds or thousands of CNAME entries pointing to the same IP address.
The AdGuard team also made a database for this, in case anyone needs it for UBOL [1]
Most, if not all of those trackers use assets that they serve from there (like a tracking pixel gif socket), so I highly doubt that uBOL will catch those; because the cat and mouse game is now in the ad tracker's favor and it is impossible to keep up now. And that was the intended purpose. We now have to play our hand with marked cards.