Send notification email when php artisan model:prune run

I can't get the notification email.

User.php

<?php

namespace App\Models;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\MassPrunable;
use Illuminate\Database\Eloquent\Prunable;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Sanctum\HasApiTokens;
use Spatie\Permission\Traits\HasRoles;

class User extends Authenticatable implements MustVerifyEmail
{
    use HasApiTokens;
    use HasFactory;
    use HasRoles;
    use MassPrunable;
    use Notifiable;
    use SoftDeletes;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'avatar_url',
        'name',
        'email',
        'password',
    ];

    /**
     * The attributes that should be hidden for serialization.
     *
     * @var array<int, string>
     */
    protected $hidden = [
        'password',
        'remember_token',
    ];

    /**
     * The attributes that should be cast.
     *
     * @var array<string, string>
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
        'password' => 'hashed',
    ];

    /**
     * Get the prunable model query.
     */
    public function prunable(): Builder
    {
        return static::onlyTrashed()->where('deleted_at', '<=', now()->subMinutes(5));
    }
}

app/Observers/UserObserver.php

<?php

namespace App\Observers;

use App\Models\User;
use App\Notifications\UserDeleted;

class UserObserver
{
    /**
     * Handle the User "created" event.
     */
    public function created(User $user): void
    {
        //
    }

    /**
     * Handle the User "updated" event.
     */
    public function updated(User $user): void
    {
        //
    }

    /**
     * Handle the User "deleted" event.
     */
    public function deleted(User $user): void
    {
        //
    }

    /**
     * Handle the User "restored" event.
     */
    public function restored(User $user): void
    {
        //
    }

    /**
     * Handle the User "force deleted" event.
     */
    public function forceDeleted(User $user): void
    {
        $user->notify(new UserDeleted());
    }
}

app/Notifications/UserDeleted.php

<?php

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Notification;
use Illuminate\Support\Facades\Lang;

class UserDeleted extends Notification
{
    use Queueable;

    /**
     * Create a new notification instance.
     */
    public function __construct()
    {
        //
    }

    /**
     * Get the notification's delivery channels.
     *
     * @return array<int, string>
     */
    public function via(object $notifiable): array
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     */
    public function toMail(object $notifiable): MailMessage
    {
        return (new MailMessage)
            ->subject(Lang::get('Account Permanently Deleted'))
            ->line(Lang::get('You are receiving this email because your account has been permanently deleted.'))
            ->line(Lang::get('Thank you for using our application!'));
    }

    /**
     * Get the array representation of the notification.
     *
     * @return array<string, mixed>
     */
    public function toArray(object $notifiable): array
    {
        return [
            //
        ];
    }
}