It would probably require some code change on the server.
You must edit the class NotificatorFirebase.java and add the sound from there, that worked for me.
Santiago, you can share the code
Hello Santiago,
i have got the same issue and would be very thankful if you could share the code.
Thanks in advance!
I was wondering how can I enable the default push notification sound on IOS?
I'm on IOS 12.1.2 and there is no sounds when I get a push notification via Traccar FCM.