FCMEvent.Notification can trigger but no notification in Android

I am testing with the example code, I can trigger FCMEvent.Notification successfully, but never display a notification (for both foreground and background).

ps: The presentLocalNotification is working perfectly.

RN version: 0.45.1
Platform: Android emulator

below is the code,
`sendNotification(token) {
let body = {
"to": token,
"notification":{
"title": "Simple FCM Client",
"body": "This is a notification with only NOTIFICATION.",
"sound": "default"
},
"priority": 10
}
if(Platform.OS === 'android'){
body = {
"to": token,
"data":{
"custom_notification": {
"title": "Simple FCM Client",
"body": "This is a notification with only NOTIFICATION.",
"sound": "default",
"click_action": "fcm.ACTION.HELLO"
}
},
"priority": 10
}
}
this._send(JSON.stringify(body), "notification");
}`