VBA ２次元配列の1次元目の要素数を変更

Option Base 1
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'★2次元配列の1次元目の要素数を増やす
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Public Function zfRedimPreserveArray(ByVal arr As Variant, ByVal rowNum As Long)
    Dim tempArr() As Variant
     
    tempArr = WorksheetFunction.Transpose(arr)
    ReDim Preserve tempArr(UBound(tempArr, 1), rowNum)
     
    zfRedimPreserveArray = WorksheetFunction.Transpose(tempArr)
End Function

Public Function zfRedimPreserveArray2(ByVal arr As Variant, ByVal rowNum As Long)
    Dim tempArr() As Variant
    Dim i As Long
    If rowNum = 1 Then
        ReDim tempArr(1, UBound(arr, 2))
        For i = 1 To UBound(arr, 2)
            tempArr(1, i) = arr(1, i)
        Next i
        zfRedimPreserveArray = tempArr
    Else
        tempArr = WorksheetFunction.Transpose(arr)
        ReDim Preserve tempArr(UBound(tempArr, 1), rowNum)
         
        zfRedimPreserveArray = WorksheetFunction.Transpose(tempArr)
    End If
End Function