If the automatic power management of apps is activated, some unused apps are automatically put into standby (deep sleeping apps), which causes them to receive no or only delayed updates or send notifications; this can be explicitly prevented under the menu item "Apps that won´t be put to sleep", which means that they are no longer put into standby.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Device care
Step 3:  Tap on  Battery
Step 4:  Tap on  App power management
Step 5:  Tap on  Apps that won´t be put to sleep
Step 6:  Tap on  Add apps
Step 7:  Choose all desired  apps
Step 8:  Confirm with  Add
  1. Open the Settings
  2. Tap on Device care
  3. Tap on Battery
  4. Tap on App power management
  5. Tap on Apps that won´t be put to sleep
  6. Tap on Add apps
  7. Choose all desired apps
  8. Confirm with Add

Samsung Instructions
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