I think you will need a QACtion to count the number of "Synced" rows and set the value as a new standalone parameter.  Then you would be able to Alarm when this new parameter = 0, you have no Sync on any table row.   You could also add an exception to the Parameter Interprete tag show some meaningful text instead of the 0
https://docs.dataminer.services/develop/schemadoc/Protocol/Protocol.Params.Param.Interprete.Exceptions.Exception.html

c# by Claude AI, not validated, but gives you the idea, if Claude had the actual protocol it would do a much better job then the below.  Would need to trigger on whenever a cell in the Sync Status column changes.

using System;
using Skyline.DataMiner.Scripting;

public class QAction
{
public static void Run(SLProtocol protocol)
{
try
{
// Read the "Sync Status" column values
object[] syncStatusColumn = (object[])protocol.NotifyProtocol(321 /*NT_GET_TABLE_COLUMNS*/, tableId, new uint[] { syncStatusColumnIdx });

if (syncStatusColumn == null || syncStatusColumn.Length == 0)
{
protocol.SetParameter(syncStatusOkCountPid, 0);
return;
}

object[] values = (object[])syncStatusColumn[0];

int syncedCount = 0;

if (values != null)
{
foreach (object val in values)
{
if (Convert.ToString(val).Equals("Synced", StringComparison.OrdinalIgnoreCase))
{
syncedCount++;
}
}
}

// Set the summary parameter
protocol.SetParameter(syncStatusOkCountPid, syncedCount);
}
catch (Exception ex)
{
protocol.Log($"QA{protocol.QActionID}|Run|Error counting synced rows: {ex}", LogType.Error, LogLevel.NoLogging);
}
}

// ── Replace these with your actual parameter IDs ──

/// <summary>PID of the table.</summary>
private const int tableId = 1000;

/// <summary>0-based column index of the "Sync Status" column within the table.</summary>
private const uint syncStatusColumnIdx = 7;

/// <summary>PID of the standalone "Sync Status OK Count" parameter.</summary>
private const int syncStatusOkCountPid = 10;
}