Step 1 (may suffice) : Go to settings > Apps and Notifications > Notifications Management > MyVizito > MyVizito Event/Shop/Restaurant/Visit > Check everything (especially Prioritised Notifications)

Step 2: settings --> apps --> advanced --> ignore battery optimizations, select the app and ignore it.

Step 3: settings --> notification panel & status bar --> notification center, select the app, then activate "allow notifications" and also "priority display".

Go to Settings > "Protected apps", check your app

Tap on the battery icon. Go to Power Management > STAMINA mode > Apps active in standby > Add your app.

Check your app in the Auto-start Manager : If you don't find it on the desktop, open the "Mobile Manager" app > Permission > Auto-start manager

Step 1: Open Security (App) > Permissions > Autostart - Enable your app

Step 2: Open Settings > Developer Options. Disable "memory optimization". To enabled Developer Options go to Settings > About. Tap on MIUI 8 times.

Open Settings > "Security settings" > "Data saving" and enable your app.

Step 1: Disable battery usage optimizations Open Settings > Apps > tap on the three-dot menu icon on the upper-right corner > Special Access > Optimize battery usage > Apps not optimized > All apps > Uncheck MyVizito.

Step 2: Make sure notifications are turned on for your app Open Settings > Apps > Select MyVizito > Notifications > App notifications > Switch to on

Go to Settings > Battery > Battery Optimization > MyVizito > Don't Optimize