tostore data from http resppponse to table

Are the Ids and codes coming as arrays/lists in the JSON response (like id: 123, codes: ["A", "B", "C"]), or are they coming as separate flat rows?
If you assume like this,

a!localVariables(
  local!httpResponse: {
    { id: 101, codes: { "A1", "A2", "A3" } },
    { id: 102, codes: { "B1", "B2" } },
    { id: 103, codes: { "C1", "C2", "C3", "C4" } }
  },
  local!flattenedData: a!flatten(
    a!forEach(
      items: local!httpResponse,
      expression: a!localVariables(
        local!currentId: fv!item.id,
        a!forEach(
          items: fv!item.codes,
          expression: { id: local!currentId, code: fv!item }
        )
      )
    )
  ),
  local!flattenedData
)

Please do not make us make assumptions about what your problem actually is and provide more details.