ACRA is an open-source crash reporting framework, not so much a tracker. (Crash reporters can be used for tracking though): GitHub - ACRA/acra: Application Crash Reports for Android
The configuration in F-Droid just pre-fills an email to send to the crash-reporting address when F-Droid client crashes. It never sends any data to any server unless the users sends that email.
Other apps might configure it differently so you’ll have to ask their respective developers.