Notification Settings
Notification Settings
First, turn on Google Calendar Notifications
https://support.google.com/calendar/answer/37242?hl=en&co=GENIE.Platform%3DDesktop&oco=1
Then verify that your Windows notifications are on and Google Chrome Notifications are active.
https://support.microsoft.com/en-us/windows/change-notification-settings-in-windows-8942c744-6198-fe56-4639-34320cf9444e#:~:text=In%20Windows%2011%2C%20Notification%20Center,Go%20to%20System%20%3E%20Notifications.