FWIW, F-Droid has never had an issue with the 'safety' of any app.
The apps are submitted to the store, and decompiled, then recompiled by people at F-Droid.
That means that the entire app is disassembled, gone through, then reassembled by F-Droid.
Each app goes through this.
That is why you will find updates slow in coming for apps on F-Droid, compaired to the 'same' app on other appstores.
The popular appstores do no such thing to protect users from bad apps.
They rely on algorythms and malware detection software, and we all know how 'well' that works.
Just think- Google warns you bot to trust any other app supplier, and yet Google is the single least trustworthy company and also the largest purveyor of malware and deceptive applications.
There is a reason that all of those fake 'scareware' ads- you know, "YOUR DEVICE IS 28.1% INFECTED AND WILL BE LOCKED UNLESS YOU ACT NOW!" will only lead you to some garbage anti-virus or cleaner app on (get this) Google Play Store.
Those advertisements are illegal, yet Google does nothing about them, and yet continues to host the apps that the ads are for.
If the ads are a lie and illegal, then how can the app be trusted?
If the app is not trustworthy, and the appstore knows this and continues to carry it, how can the appstore be trusted?
You will not find any apps as described above on F-Droid.
There are no bad apps on F-Droid, as far as doing anything subversive or otherwise wrong to a user.
F-Droid does have a system of labeling apps that have certain code in them, and you will see thos as a label stating 'This app has features that you may not like."
If you scroll down and tap on what is listed in that category, you will get an eloborate discription of exactly what that means for that app.
The vast majority of these are nothing to worry about, but are notifications for those that need to know.
Personally, I try to stay away from any that say that they track my activity.
Google left a bad taste in my mouth about that, even if it (on F-Droid) is usually just app analytics to tell developers how the app is working.