Is it just me, or is there no way to download activity details? I click on an activity, then there's a few examples and a link to download, but this leads to a

Is it just me, or is there no way to download activity details? I click on an activity, then there's a few examples and a link to download, but this leads to a generic "Download your information" page and I cannot see an entry for the app or off-facebook specifically... How can I block it? some apps are on my iPhone, but I don't have the Facebook app on it (I do have messenger), and only used the apps on the phone. Aren't they isolated in some way?