portal-api/app/Mail/Admin/ServiceCancellationRequestMail.php

<?php

namespace App\Mail\Admin;

use App\Mail\TemplateMailable;
use Illuminate\Bus\Queueable;

class ServiceCancellationRequestMail extends TemplateMailable
{
    use Queueable;

    public function __construct(public array $data) {}

    protected function scenario(): string
    {
        return 'admin_service_cancellation_request';
    }

    protected function variables(): array
    {
        return $this->data;
    }
}