From the Safari section of Apple’s iOS 16 Preview page:
Adds support for opt‑in notifications on iOS. Coming in 2023.
As much as I hate being prompted to enable notifications for web pages, this is probably the biggest feature that sets native apps apart from web apps from a practical standpoint. The introduction of this feature will give developers a much more realistic alternative to the App Store.
And that’s not just about avoiding the pitfalls of Apple’s app review process, this could also help startups streamline their development by targeting the web first, giving users a pretty solid experience on iOS, Android, and the desktop before they start working on native apps for each platform.