help calculated column or measures help

ID 3 is not approved.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUXIE4pCgUFelWJ1oJSOogJujTzBExBhdiQm6AMgQJ3RDnDAMcUI3BFUJyBRndFOcMUxBFTFBFYkFAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ID = _t, Certificate = _t, Approval = _t]),
    #"Replaced Value" = Table.ReplaceValue(Source,each [Approval],each if [Approval]="TRUE" then 1 else 0,Replacer.ReplaceValue,{"Approval"}),
    #"Grouped Rows" = Table.Group(#"Replaced Value", {"ID"}, {{"Overall", each List.Product(_[Approval])}}),
    #"Changed Type" = Table.TransformColumnTypes(#"Grouped Rows",{{"Overall", type logical}})
in
    #"Changed Type"

How to use this code: Create a new Blank Query. Click on "Advanced Editor". Replace the code in the window with the code provided here. Click "Done". Once you examined the code, replace the Source step with your own source.