In the settings of your Session app, tap on 'Notifications' and then at the bottom there is an option to change 'notification content'.
The three options are: Name and message, Name only, and No name or message
In the settings of your Session app, tap on 'Notifications' and then at the bottom there is an option to change 'notification content'.
The three options are: Name and message, Name only, and No name or message