How to turn off\on Chrome browser pushes in an OS notification center?
Here's how to check whether this setting is enabled or not. Usually, it is in the "Default" mode.
Quick Tip: You must be running Google Chrome version 68+ to use control notifications. You can check if you’re running the latest version on the main menu > Help > About Google Chrome.
Type the following path in the address bar and press Enter:
Use the drop-down menu on the right and select Enabled (or Disable to turn the feature off).
Click the Relaunch now button.