In the comments array, I need to replace the keys with the date the comment was created, is it possible to do this?

[zabavnikov]

I tried to do this in the CommenQuery, but the array is returned with the usual keys.

return $comments->limit($args['limit'])->get()->mapWithKeys(function ($item, $key) {
    $stack = Carbon::parse($item['created_at'])->format('Ymd');
    return [$stack => $item];
})->all();

[mfn]

No, that's not possible.

But that's not a limit of neither this library or the underlying GraphQL PHP library: it's a shortcoming in the official GraphQL specification.