https://www.rockbox.org/wiki/ConvertiTunesDBtoTagCache
The Windows Tool here is offline. The link to it does nothing. Please tell me anyone of you still have that.
I want it badly.Nevermind, it's just me being stupid and ignoring the written disclaimer at the top. Rockbox was indeed able to automatically detect all iTunes synced files.
I still have two issues though: The album arts are not showing although they are 500x500 JPGs and when I enter the database and go to "artists" it shows some songs of some albums separately if there's someone else singing for that song. I want the database to go by album artist instead. How can I achieve this?