關於「Default_notification_icon」標籤，搜尋引擎有相關的訊息討論：

c# - How to use a custom icon as FCM default notification icon in ...stackoverflow.com › questions › how-to-use-a-custom-ico...only Android: notification is displayed without image icon · Issue #3967github.com › invertase › react-native-firebase › issuesReceive messages in an A