@jlherren I've installed the app on my iPhone and didn't see any issues with it regarding the parts the mentioned links talk about.
Two minor issues did occur however:
The main menu is somewhat hidden by the iOS Homebar.
When you use the app in landscape mode, the app has a whitespace left and right (perhaps padding on the body or perhaps using the wrong width; innerwidth vs outerwidth?)
See https://cli.vuejs.org/core-plugins/pwa.html#configuration
And https://medium.com/@firt/dont-use-ios-web-app-meta-tag-irresponsibly-in-your-progressive-web-apps-85d70f4438cb