Step 1: Tap on the "Settings"
Step 2: Goto "Notifications & status bar" menu
Step 3: Now tap on "App notifications"
Step 4: Now find "Skooly" app, on the list of apps and tap on it
Step 5: Now at the top, there will be "Show notifications", slide the toggle to enable notifications
Now you will receive notifications from "Skooly" app
If you cant find your settings here, please find your device in the following list of Xiaomi phones