[Power Query] - Handle hierarchy table

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let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("rZRLDoMwDESvUrFmYQ8BhyU3QGp3iPtfo+ETO1JFxccLxCPKvIxCYJoqFoSGqaqrkdKdwYY2SoqUkXb8jLThXO82y8FsKEav2KTshqfdpOyGh906FN24MbzRLebhgUJusaKOam6gjK/1sjw/yXOeyYczfxN8JdEvG6Idt0O34dm6poGPJvhoOh+N+GiihwbFm8ITDXw0wUfT+WjERxMdNKCWh/c6T1KoIUVSJMX/IvEQJVPbmQhn04Whz6untYMd4nBta/oehQb3NFj+5/lbWB7EkBRJ8dhoNrjagqtNXG3RwzZ/AQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Level0 = _t, Level1 = _t, Level2 = _t, Level3 = _t, Level4 = _t, Level5 = _t, Level6 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Level0", type text}, {"Level1", type text}, {"Level2", type text}, {"Level3", type text}, {"Level4", type text}, {"Level5", type text}, {"Level6", type text}}),
    #"Merged Columns" = Table.CombineColumns(#"Changed Type",{ "Level2", "Level3", "Level4", "Level5", "Level6"},Combiner.CombineTextByDelimiter("|", QuoteStyle.None),"Merged"),
    #"Added Custom" = Table.AddColumn(#"Merged Columns", "Custom", each List.RemoveItems(Text.Split([Merged],"|"),{" ",null})),
    AddedCustom1 = Table.AddColumn(#"Added Custom", "ListCount", each List.Count([Custom])),
    MaxCount=Table.AddColumn(AddedCustom1, "MaxCount", each List.Max(AddedCustom1[ListCount])),
    #"Added Custom1" = Table.AddColumn(MaxCount, "Custom.1", each List.InsertRange([Custom],0,List.Repeat({List.First([Custom])},[MaxCount]-[ListCount]))),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom1",{"Merged", "Custom", "ListCount", "MaxCount"}),
    #"Extracted Values" = Table.TransformColumns(#"Removed Columns", {"Custom.1", each Text.Combine(List.Transform(_, Text.From), "|"), type text}),
    #"Split Column by Delimiter" = Table.SplitColumn(#"Extracted Values", "Custom.1", Splitter.SplitTextByDelimiter("|", QuoteStyle.Csv), {"Level 3", "Level 4", "Level 5", "Level 6", "Level 7"})
in
    #"Split Column by Delimiter"