iOS only allows push notifications for web apps that have been added to your Home Screen from Safari. Here's how — takes about 30 seconds.
1
Open in Safari
Open polyport.chat in Safari — not Chrome or another browser. Only Safari can add the app to your Home Screen on iOS.
2
Tap the Share button
It's the square with an up-arrow, usually at the bottom of the screen. On iPad it's at the top.
3
Add to Home Screen
Scroll down in the share sheet and tap Add to Home Screen, then Add. A PolyPort.Chat icon will appear on your Home Screen.
4
Open from the icon and enable notifications
Open the app from the new Home Screen icon (not from Safari). Sign in, go to Profile → Notifications, and tap Enable notifications. iOS will ask for permission — tap Allow.
Heads up: If you open PolyPort.Chat in Safari after installing, notifications still won't work from that tab. Always launch it from the Home Screen icon.