I don't know if big companies even know how to make web apps. Honestly. Which is extra insane to me because there's so much investment in web technologies. On my team at $BigTech there's like 1 or 2 people out of 30 people on our team that knows web, the rest are mobile. I'm a web guy but I refuse to touch our web-app because they butchered the tech stack and I don't have the energy to deal with that BS. We still have an mobile-web version distinct from the 'desktop' version because.... I don't know why, whoever wrote it never learned about responsive web design and we never bothered to move out of the stone ages because if people want to use the app on their phone, they should download the native app of course! And by "native" I mean we built our own half-baked framework so that we could cross-compile for Android and iOS.

Also I don't think these people know how capable PWAs are. There's very little you can't do in a web-app that you can do with a native app.