If your browser blocks ads, but websites don’t see that it is, then that’s actually a good thing. As long as these features are actually working, then this is beneficial to keeping your fingerprint from becoming unique. It’s hard to have a non-unique fingerprint without the Tor browser.

In all of my browser usage, uBlock has never shown up as “Adblock enabled” on a fingerprint test for me. Maybe it takes steps to prevent being detected?