On iOS you can easily check what permissions an app has in Settings. For instance I can see I have granted Instagram access to location, microphone, camera, photo album. Threads has none of those. I don't use Health and I'm not sure what financial data would mean, Apple Pay? That's approved per each use.
If threads has figured out a way to collect those things without having permissions, then yes, that would be the darkest of dark patterns.
If threads has figured out a way to collect those things without having permissions, then yes, that would be the darkest of dark patterns.