Upgraded from iPhone 5se to iPhone 11. Everything transferred over just fine and is working, however notifications from 3rd party apps (e.g. weather, news, etc) are still going to the 5se.
I have power cycled the 11, and ensured that all of my notification options in the apps are configured correctly. The settings in each app on both the 11 and the 5se are identical.
Do I need to sign out of iCloud on the 5se? Remove the 5se somehow? Something else? And how do I go about doing this? There is no information about how to deactivate an old device in the support material, only how to activate the new one.