I know a couple of people through my professional network who hold this title and what I've gathered is that delegates have a lot of autonomy and authority. And Boeing does organize the company and even its information systems to practically treat them as FAA regulators.
And, FWIW, the type of person who ends up self-selecting into this kind of work are serious people who deeply care about airline safety. It is a rather thankless job with a lot of onerous, tedious paperwork that is not very sexy.
For what it’s worth, NASA doesn’t directly build much. Even the Apollo program was a huge web of private vendors (many who still exist today).
SpaceX is/was just another entry on the long list of private contractors commissioned to build things for NASA, DoD, et al. But different here is that SpaceX worked at very very different speed than Aerojet Rocketdyne, ULA, and all the other old-space fossils. Still, those old contractors are valuable for other things — good welders, technicians, and engineers take many years to train and these old legacy corps provide a steady income stream to maintain a certain level of manufacturing readiness.
The pre-LTE era was quite the experience as a teenager, and it wasn’t until the iPhone 5 when smartphones became a ubiquitous and affordable thing (or justifiable) for many of my friends. I didn’t have a smartphone until my junior year of high school!
SMS feature phones like the sidekick, with physical keyboards, ruled the day and many of my classmates actually disliked smartphones because of the lack of physical keys!