askvortsov Thank you for help!!
You replied to me on the other disscusion about the bug that should be fixed versions ago.
However, I have upadated to the lastest version of PWA.( actually i tried uninstall and install couple times recently so the version should not be the problem)
And I did active all push notificaton in personal setting panel. I know that users should manually allow the browser to active the notification, I think I did it correctly since it's not showing the banner says"due to the browsers restriction, you must opt to receive notification......." anymore.
I know that ios not support push notification. Therefore I tested in Anroid system with chrome & firefox/ desktop version with chrome . Still no push notification.
I used Pwabuilder to test. It says my
Uh no, your Manifest needs more work before this badage in unlocked
And the optional part of Service Worker :
Uses Periodic Sync for a rich offline experience
Uses Background Sync for a rich offline experience
is not active.
But I am not sure if it's the problem.