Ok, I found out that a number of built-in plugins are in fact not pre-packaged for iOS. I’m talking about basic stuff such as Blueprint Stats. I tried to reinstall the engine and it didn’t work - I have to disable those plugins to make the packaging work without a mac to compile the project.
4.16.2 is proven to be quite literally a half-baked release… and the half that is not baked is causing me a lot of headache.