It wasn't only games, but having been there the cambrian explosion following the appstore's release was very much 95% games (much to Jobs' dismay).
> WebOS’s apps were as good as any other platforms apps and were PWAs unless I’m mistaken.
They were built out of "web technologies" (HTML and javascript) but they were not PWAs as they were significantly augmented with native components and concepts, none of which were part of the browser (even as proprietary extensions). That's like calling Firefox a PWA because it's built out of XML and Javascript (or was, not sure that's still the case).
iOS' first draft (pre appstore) was pretty much just web pages you pinned to your springboard (which you can still do). There were a few allowances for removing browser chrome and the like, or providing a few icons, but for the most part it was exactly what you'd run in a browser.
