As of iOS and iPadOS 16.4, web apps saved to your Home Screen support badging!
We've heard questions about the deets, so we wrote a blog post with the deets.
https://webkit.org/blog/14112/badging-for-home-screen-web-apps/
Badging for Home Screen Web Apps

Along with the many other features for web apps on iOS and iPadOS 16.4, WebKit now includes support for the W3C’s Badging API.

WebKit
@bradeeoh May I please ask a very basic question? Is there a way to disable web apps from running in the background? Basically, I wonder whether web apps could be used as a sandboxed alternative to installed apps.
@saf Currently, web apps on iOS and iPadOS cannot run in the background unless the user has granted them notifications permission and their server sends a push.
@bradeeoh @saf Thank you very much!