Yes looking at the NC data, most pedestrian fatalities are outside cities. Higher vehicle speed also likely contributes to that.IME, the further out from a metro area, the more drivers think their vehicles have a right of way over pedestrians so area does matter. The more there's local pedestrian and biker traffic, the more vehicle traffic will actually yield to pedestrians.
"Driver distracted by cell phone" is a reporting category but relatively few crashes are reported that way. Both incident and fatality rates were higher decades ago before cell phones existed.