Shocked by the quantity of trackers in Foss android apps

Recently I installed DuckDuckGo with tracker blocker enabled and after one day it showed me 116 tracking attempts by Google and another company for Librera and 63 from an open source PDF converter app. Even Firefox uses Google trackers in the internet (I don’t use it but I just found this info in the internet). Are foss apps really private on android?

android android apps app apps blocker don duckduckgo firefox foss found google internet open source pdf privacy tracker trackers tracking