Filter whether the request is a GraphQL HTTP Request. Default is false, as the majority of WordPress requests are NOT GraphQL requests (at least today that’s true 😆).
The request has to “prove” that it is indeed an HTTP request via HTTP for this to be true.
Different servers _might_ have different needs to determine whether a request is a GraphQL request.
- $is_graphql_http_request (bool): Whether the request is a GraphQL HTTP Request. Default false.