issue in voice messge duration

[prof-fares]

how can I display the voice message duration , I already passed the duration into the message model
Message(
id: id?.toString() ?? '',
message: chatViewMessageType == MessageType.text
? (message ?? '')
: (file ?? ''),
createdAt: parsedDate ?? DateTime.now(),
sentBy: sender?.id?.toString() ?? '',
messageType: chatViewMessageType,
voiceMessageDuration:Duration(seconds: 15) // test

and when voice is displayed there is no duration appears
is there any step missed??