Receiving notifications when phone is locked

[Droppers]

The last time I used push notifications on android was in the good days where there were basically no restrictions 😄

I am building an internal app where it is important that the user always receives push notifications, even when their device is locked. I have tried various things, but I cannot get it to work, notifications only appear after I unlock my phone.

I am using the 'notification' section in the FCM payload. Could this be a problem, and should I be using the 'data' section and displaying the notification myself?

This is what I have tried so far:

• Created a channel with importance 'High'
• Sent a FCM notification with 'priority=high' and the correct channel in the 'android' section
• Set battery background usage to 'Unrestricted' on a Google Pixel

This is basically what it says you should do according to the firebase devs themselves:
https://firebase.blog/posts/2025/04/fcm-on-android/