Order by on polymorphic relationship

I have a polymorphic relationship (requests - requestable) which I want to do an order by the morph class.

Here is what my current implementation looks like:

// Model: Request
// Table: requests
// Morph: requestable_type, requestable_id

public function requestable()
    {
        return $this->morphTo();
    }


// Model: MaintenanceRequest
// Table: maintenance_requests

public function request()
    {
        return $this->morphOne(Request::class, 'requestable');
    }


// Model: HousekeepingRequest
// Table: housekeeping_requests

public function request()
    {
        return $this->morphOne(Request::class, 'requestable');
    }

Both the maintenance request and housekeeping request has a column named ticket. So when querying, how can I order by the requestable relationships ticket?

What I have tried:

$query = $this->model->newQuery(); // model being Request
$query->with(['requestable' => function($q) {
    $q->orderBy('ticket', 'desc'); // asc or desc comes from SPA
}]);

This does not seem to work. I am not sure how a join on this would look like since I want to order by all requestable classes instead of one specific class. What I mean is I don't want to run the order by for specifically MaintenanceRequest or HousekeepingRequest but can I do order by the ticket for both the models? If so, what is the approach?