Switch from using a silent push notification to a user push notification, then that will get displayed to the user even if the app is terminated.
If the push payload's notification title/subtitle/body can be set by the server then it will just get displayed to the user directly. If the notification title/subtitle/body needs to be changed after the push has been received, then that can be done by using a notification service extension.
Topic:
App & System Services
SubTopic:
Notifications
Tags: