If like me you are both lazy and not a lawyer, check ToS;DR https://tosdr.org/ but honestly it's like labels on food products.

You don't need the damn label to know that Coca Cola is not good but water is... so yes, don't use Facebook, great. You knew that already if you care just a bit about privacy.

Still, if you want to go there, please do check https://tosdr.org/ and if you can contribute back.

What I personally find more useful is F-Droid because if an app is not present on it, it's rarely because technically it can't, it's often because of anti-patterns. The app tries to go on F-Droid only to realize it's not "just" another store but they have rules, good rules IMHO, like no Google Analytics and whatever backends to track user behavior.

Also Android app analysis like https://exodus-privacy.eu.org/ is quite good, same idea, finding anti-patterns but not in code (which isn't a good start if it's not FOSS anyway) but rather in how the app actually behaves.

TL;DR: yes, do read the ToS if you can, but if you can't don't just press "yes" or avoid and move on, rely on the work of others like ToS;DR, F-Droid or exodus-privacy!