Cursor based pagination in rest api query

Hi FelipMark ,
you will find an example here: How not to miss the last page when paging with Power BI and Power Query (thebiccountant.com)

applied to your scenario it could look like so: 

let
    UrlBase = "https://graph.facebook.com/v17.0/act_636965624958777/insights",
    Cabecalho = [Authorization = "Bearer TOKEN],
    Parametros = [
        fields = "ad_id,campaign_name,ad_name,adset_name,spend",
        time_increment = "1",
        level = "ad",
        limit = "500"
    ],
    Consulta = Web.Contents(
        UrlBase,
        [
            Headers = Cabecalho,
            Query = Parametros
        ]
    ),
paging =
List.Generate( ()=>
    [URL = "DummyThatIsNotUsedHere",
    Data = Json.Document(Consulta),
each [URL] <> null,
each [
  URL = [Data][next],
    Data = Web.Contents(
        [URL],
        [
            Headers = Cabecalho,
            Query = Parametros
        ]
    )
)
in
    paging