PowerQuery

let
    filePath = "?????.geojson",
    source = Json.Document(File.Contents(filePath)),
    converted2Table = Record.ToTable(source),
    features = converted2Table{5}[Value],
    fearure2table = Table.FromList(
      features, Splitter.SplitByNothing(), null, null, ExtraValues.Error
    ),
    expandedColumn1 = Table.ExpandRecordColumn(
      fearure2table, "Column1", {
        "id", "properties", "geometry"
      }, {
        "id", "Column1.properties", "Column1.geometry"
      }
    ),
    expandedColumn1.properties = Table.ExpandRecordColumn(
      expandedColumn1,
      "Column1.properties",
      {"name"},
      {"name"}
    ),
    expandedColumn1.geometry = Table.ExpandRecordColumn(
      expandedColumn1.properties,
      "Column1.geometry",
      {"coordinates"},
      {"Column1.geometry.coordinates"}
    ),
    extracted = Table.TransformColumns(
      expandedColumn1.geometry, {
        "Column1.geometry.coordinates",
        each Text.Combine(List.Transform(_, Text.From), ","),
        type text
      }
    ),
    splitted = Table.SplitColumn(
      extracted,
      "Column1.geometry.coordinates",
      Splitter.SplitTextByDelimiter(",", QuoteStyle.Csv),
      {
        "lon",
        "lat"
      }
     ),
    result = Table.TransformColumnTypes(
      splitted,{
        {"lon", type text},
        {"lat", type text}
      }
    )
in
    result