I'm not very familiar with iOS dev, but I'd suspect a lot of dependencies, yes.

Also, the Uber app has a LOT more features than you would expect at a glance, due to extensive customization of the experience (i.e. feature flagging) along many vectors, and so it wouldn't surprise me at all if this ends up adding to a lot of code.

Edit: Linked post from sibling commenter bhupy outlines this in detail.