The solution is a workaround via the Apple Wallet. It's possible to create a pass which you can use for Native Push Notifications which lighten up the iPhone Display (from sleep) and show a custom icon, title and message.
Send me a DM if you want to learn more about it.
@andythebreaker I know right! I'm currently waiting for Apple to confirm my developer account.. so I can finally implement push notifications in my web app :)
if you're interested in a short explanation feel free to leave me a private message!