Call vb script activity can center align cells in an excel file. If Excel is to be used in the processor in real life immediately after the call etc., script activity, a timer should be added (Ex: PT5S).
Set objXLApp = CreateObject("Excel.Application")
objXLApp.Visible = false
Set objXLWb = objXLApp.Workbooks.Open("C:\Users\Desktop\Test.xlsx")
Set oSheet = objXLWb.Worksheets(1)
oSheet.Range("A1:L45").WrapText = True
oSheet.Columns("A:L").VerticalAlignment = -4108
oSheet.Columns("A:L").HorizontalAlignment = -4108
objXLWb.save
objXLWb.close false
objXLApp.Quit
Set objXLWb = nothing
Set objXLApp = nothing
Justified alignment, right aligns, left align, etc. The following codes can be used to perform operations.