Collaborate for iOS notifies you of one-to-one chat messages and of group chats where someone mentions you using the @ symbol.

When you enable notifications in the mobile app settings, the mobile device delivers notifications based on the device settings.

See Settings > Notifications > Collaborate on your iOS device. The Genesys Cloud mobile app supports Show in Notification Center, Sounds, Show on Lock Screen, and badging, including badge count, on the app icon.