REST API Requests no QM data

Hi John,

I’m trying to debug a custom endpoint by doing a POST request, as an authenticated superadmin with an application password. I tried the first method with _wpnonce in the request URL, but I got an error “rest_cookie_invalid_nonce”
With the app password, the request is successful but I don’t receive any QM data, the plugin is active and I can see the output in the admin with this user.

Any ideas? Does the endpoint callback have to send back a specific type? I’ve tried new WP_REST_Response and an array.