Many, some of which are quite dangerous: https://privsec.dev/posts/android/f-droid-security-issues

I’m not the most informed regarding this topic, but don’t most LLMs just copy code, from all they’ve seen? So it’s copying the code - therefore, copyleft applies, regardless.

Keep in mind that there are many security concerns regarding the official repository; I would personally prefer using either Accrescent, Obtanium (more advanced), or the IzzyOnDroid repository, in case you still want to mainly use FDroid.