iOS device not receiving push notification from Firebase Cloud Function - ios

Question

I've created an Ionic chat app with firebase cloud functions. The push notifications are working with Android but not ios.
async getIosToken(token: string, userId: string): Promise<void> {
if (!FCM.hasPermission()) {
FCM.requestPushPermission()
.then(async (hasPerm) => {
if (hasPerm) {
const iosToken = await FCM.getAPNSToken();
if (iosToken === token) {
return;
} else {
this.saveToken(iosToken, userId);
}
}
});
} else {
const iosToken = await FCM.getAPNSToken();
if (iosToken === token) {
return;
} else {
this.saveToken(iosToken, userId);
}
}
}
saveToken(token: string, userId: string): void {
this.userSvc.saveTokenToFirestore(token, userId)
.then(() => {
this.storageSvc.setDeviceToken(token);
});
}
The iOS token is being saved to firebase...although it never prompted the user for request permissions.
I console logged the firebase cloud function and I can see the APNs token.
import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
admin.initializeApp();
exports.newChatNotification = functions.firestore
.document(`chat/{id}/messages/{doc}`)
.onWrite(async event => {
const message = event.after.data();
let data: any;
let device: any;
const db = admin.firestore();
console.log('message', message);
console.log('db', db);
if (message) { data = message; }
const receivingUserId = data ? data.receivingUserId : '';
const content = data ? data.content : '';
const sendingUserId = data ? data.sendingUserId : '';
console.log('payload', receivingUserId, sendingUserId);
const payload = {
notification: {
title: 'New message',
body: `${content}`,
click_action: 'FCM_PLUGIN_ACTIVITY'
},
data: {
page: 'tabs/travel-buddies',
}
};
console.log('payload2', payload);
const devicesRef = (await db.collection('devices').doc(`${receivingUserId}`).get()).data();
if (devicesRef) { device = devicesRef; }
const token = device ? device.token : '';
console.log('devicesRef', devicesRef, token);
return admin.messaging().sendToDevice(token, payload);
});
Here's the firebase cloud function console
I'm not sure how to troubleshoot why ios is not receiving a push notification because there aren't any errors and I'm getting the APNs token.
I've also tried updating the build system per Google searches online:
Any help would be greatly appreciated.