Power Query steps

Hi michalnrf ,

Try this:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("bZDBCsQgDET/xXOhZsa/KT0KC3tYaBf299vYkkY3YNDBF2fMsqT9VetX0pTOlWUWmZEBFfCCJtbJNf0+27tuetJC2wNAL3hDIcC7m60CoNjzuhuAJzh8cPjgGIKjC87/4OiCi2UzgGab21R42TpBE11TP69hHAxtHVAeW3hbeFsMtiX87QmsBw==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t, Column5 = _t]),
    #"Replaced Value" = Table.ReplaceValue(Source,"","Worker",Replacer.ReplaceValue,{"Column2"}),
    #"Grouped Rows" = Table.Group(#"Replaced Value", {"Column1"}, {{"Rows", each _, type table [Column1=nullable text, Column2=nullable text, Column3=nullable text, Column4=nullable text, Column5=nullable text]}}),
    #"Promoted Headers" = Table.TransformColumns(#"Grouped Rows", {{"Rows", each Table.PromoteHeaders(_)}}),
    #"Added Custom" = Table.AddColumn(#"Promoted Headers", 
        "Rows2", 
        each Table.RenameColumns([Rows],{[Column1], "Sheet"})),
    #"Unpivoted Other Columns" = Table.TransformColumns(
        #"Added Custom", 
        {
            {"Rows2", each Table.UnpivotOtherColumns(_, {"Sheet", "Worker"}, "Date", "Data")
            }
        }
    ),
    Expanded = Table.Combine(#"Unpivoted Other Columns"[Rows2]),
    #"Reordered Columns" = Table.ReorderColumns(Expanded,{"Sheet", "Date", "Worker", "Data"}),
    #"Sorted Rows" = Table.Sort(#"Reordered Columns",{{"Sheet", Order.Ascending}, {"Date", Order.Ascending}, {"Worker", Order.Ascending}})
in
    #"Sorted Rows"