Question about Roborock S5

Hello all I have not been receiving push notifications on my iPhone for a long time. I have the following key data: iPhone 11 Pro (iOS version 14.2) Xiaomi App Version 5.5.1 Roborock S5 Version 3.5.7_002008 Have allowed all possible push notification settings on the iPhone. I have also enabled everything in the Xiaomi App. Other devices in the Xiaomi App can display push notifications, but not the Roborock S5. Only the Roborock S5 does not give push notifications. It can only show notifications in the app itself, at the map. I am a software developer myself and have tried everything so far, but I think it is somehow due to the app or my configuration with the Xiaomi server itself. Xiaomi support and Roborock support don't really take support requests seriously and don't respond. @Galaxus: Can you clarify something with the manufacturer? Does anyone have the same problem and perhaps a solution?