Run background service even after kill / close the app

#1

Run a Background Service in Ionic 4 even after close / kill the app by user.
Firebase push notification works in foreground, background, app killed/ Close.
I want to open app immediately push notification received,
(it works if click the notification, want to open immediately received notification without click in full screen)
Note: background-mode work only in foreground / background, not work if app is killed / closed
For that I want to run a background service to watch the push notification, and force to open app or open ui (like whatsapp),
Is there any other solution, please share .