WordPress REST API will not permit me to filter by writer ID when referred to as internally, works externally in Postman

I am at present making a customized API endpoint for a website that I am constructing, which works completely high-quality other than this situation with writer ID’s.

If I do a GET request to web site.native/wp-json/wp/v2/podcasts it returns legitimate JSON of all the podcasts Customized Submit Sort. If I do a GET request to web site.native/wp-json/wp/v2/podcasts?writer=1 it additionally returns legitimate JSON of all the podcasts Customized Submit Sort – no issues right here.

The issue nonetheless comes from another code that I am writing, I am making an attempt to do that in a customized perform:

$server = rest_get_server();
$podcastsRequest = new WP_REST_Request( 'GET', '/wp/v2/podcasts?writer=1');
$podcastsResponse = rest_do_request( $podcastsRequest );
$podcastsData = $server->response_to_data( $podcastsResponse, false );

After I run it in Postman I get the next response:

{
    "code": "rest_no_route",
    "message": "No route was discovered matching the URL and request technique.",
    "knowledge": {
        "standing": 404
    }
}

If I do that name internally contained in the perform, it really works high-quality:

$server = rest_get_server();
$podcastsRequest = new WP_REST_Request( 'GET', '/wp/v2/podcasts');
$podcastsResponse = rest_do_request( $podcastsRequest );
$podcastsData = $server->response_to_data( $podcastsResponse, false );

I can’t work out why it is producing that error when a direct name to it really works high-quality?

EDIT:
To offer extra context, that is the perform I am utilizing:

perform get_all_posts(WP_REST_Request $request){
    $server = rest_get_server();

    if($request->get_param('id')){
        // $writer = $request->get_param('writer');
        $podcastsRequest = new WP_REST_Request( 'GET', '/wp/v2/podcasts?writer=1');
        // $articlesRequest = new WP_REST_Request( 'GET', '/wp/v2/articles?writer=1');
        // $webinarsRequest = new WP_REST_Request( 'GET', '/wp/v2/webinars?writer=1');
        // $expertInterviewsRequest = new WP_REST_Request( 'GET', '/wp/v2/expert-interviews?writer=1');
        // $guidesRequest = new WP_REST_Request( 'GET', '/wp/v2/guides?writer=1');
    } else {
        $podcastsRequest = new WP_REST_Request( 'GET', '/wp/v2/podcasts' );
        $articlesRequest = new WP_REST_Request( 'GET', '/wp/v2/articles' );
        $webinarsRequest = new WP_REST_Request( 'GET', '/wp/v2/webinars' );
        $expertInterviewsRequest = new WP_REST_Request( 'GET', '/wp/v2/expert-interviews' );
        $guidesRequest = new WP_REST_Request( 'GET', '/wp/v2/guides' );
    }

    $podcastsResponse = rest_do_request( $podcastsRequest );
    $podcastsData = $server->response_to_data( $podcastsResponse, false );


    $articlesResponse = rest_do_request( $articlesRequest );
    $articlesData = $server->response_to_data( $articlesResponse, false );

    $webinarsResponse = rest_do_request( $webinarsRequest );
    $webinarsData = $server->response_to_data( $webinarsResponse, false );

    $expertInterviewsResponse = rest_do_request( $expertInterviewsRequest );
    $expertInterviewsData = $server->response_to_data( $expertInterviewsResponse, false );

    $guidesResponse = rest_do_request( $guidesRequest );
    $guidesData = $server->response_to_data( $guidesResponse, false );

    $merged = array_merge(
        $podcastsData,
        $articlesData,
        $webinarsData,
        $expertInterviewsData,
        $guidesData,
    );

    return $merged;
}

add_action('rest_api_init', perform () {
    register_rest_route( 'wp/v2', '/all-posts', [
        'methods'  => 'GET',
        'callback' => 'get_all_posts',
    ]);
});

As I’ve mentioned above, if I simply use the new WP_REST_Request( 'GET', '/wp/v2/podcasts' ); endpoints, it really works high-quality, but when I try to use new WP_REST_Request( 'GET', '/wp/v2/podcasts?writer=1' ); it returns that error, regardless of a direct name to web site.native/wp-json/wp/v2/podcasts?writer=1 returning all of the posts for the writer.