must set the x-fapi-interaction-id response header to the value received from the corresponding FAPI client request header or to an RFC4122 UUID value if the request header was not provided to track the interaction, for example, x -fapi-interaction -id: c770aef3-6784-41f7-8e0e-ff5f97bddb3a;
At https://openid.net/specs/openid-financial-api-part-1-1_0-final.html#rfc.section.6.2.1
But at https://openbanking-brasil.github.io/areadesenvolvedor/#cabecalhos-http response headers, the header (x-fapi-interaction-id) is not mandatory
which one should I consider?