First off, please check whether Google Chrome is allowed to display notifications by visiting System Preferences -> Notifications & Focus, and ensuring Allow Notifications for Google Chrome is toggled on:
Second, please check whether macOS Focus mode / Do Not Disturb mode is activated, by visiting System Preferences -> Notifications & Focus -> Focus tab, and ensuring Do Not Disturb is toggled off:
Then, conduct the test again. If it still doesn't work, please try conducting the test using our Web Push demo page. If it still doesn't work, let us know and we'd be glad to assist.