NotificationContent.Subtitle
From Xojo Documentation
Property (As String )
aNotificationContent.Subtitle = newStringValue
or
StringValue = aNotificationContent.Subtitle
New in 2020r2
Supported for all project types and targets.
or
StringValue = aNotificationContent.Subtitle
New in 2020r2
Supported for all project types and targets.
A secondary line of text that appears below the title of the notification message.
Notes
This information may not be shown if the device is locked and the user has hidden message details.