I am not sure that this question belongs here, as it would not seem related to being a webmaster. For future reference, maybe Superuser.com would be more appropriate.
In answer to your question - Websites control exactly what trackers they have, as these trackers are added due to actions of the web designer or web master. Websites can, of-course, only block trackers which they have control over - ie they embed code for in their websites.
As a relevant aside which may help - Web Trackers very often "come along for the ride" when a webmaster embeds functionality into the site - Google Analytics requires Google tracking to work - so when the code to enable Google Analytics is embedded, so is its tracking. The same is true for a lot of the social media plugins. Likewise if a page shows adverts, trackers related to those advertising companies are added as well.