I notice non-native apps. Even if it is very subtle: Apple has some menus around the iCloud settings interface that are actually a webview.
But what am I supposed to do, mail the dev telling them to make a native app instead? If they haven't made one, I understand that they can't afford it.
On your phone, open Settings, then tap on your name (apple id), then tap on "payment and shipping", "subscriptions", or "media and purchases" -> "view account". All of those are webviews.