When I open my Files app, I see the standard options (iCloud Drive, On my iPhone, Recently Deleted) plus a few cloud services (Google Drive, Dropbox, Quip)
When I create a new Document Based App, I see the standard options + only Google Drive
This is after hitting ... -> Edit, so Dropbox isn't just hidden. There's no way to access it in my app.
Is there something I need to customize in my app to make Dropbox show up using the Document Browser?