Convert / Replace tab stops to comma

Find and Replace Format seems to work only if the Tab stop positions are known:

With ThisDocument.Range.Find
    For L = wdTabLeaderDots To wdTabLeaderLines
        .ParagraphFormat.TabStops.Add Position:=36, Leader:=L
        .Execute "^t", , , , , , , , , ",", wdReplaceAll
    Next
End With

Alternative can be to check the tab stops of each paragraph ( BTW WdTabLeader has 6 values ) :

Dim p As Paragraph, t As TabStop

For Each p In ThisDocument.Paragraphs
    For Each t In p.TabStops
        If t.Leader Then p.Range.Find.Execute "^t", , , , , , , , , ",", wdReplaceAll
    Next
Next