No spatial index created when using in Symfony

[loalf]

Adding the spatial flag to the index doesn't create a spatial index.

This is my entity (partial example):

<?php

declare(strict_types=1);

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;
use Jsor\Doctrine\PostGIS\Types\GeometryType;

#[ORM\Index(columns: ['center'], flags: ['spatial'])]
class Location
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column]
    private ?int $id = null;

    #[ORM\Column(
        type: GeometryType::GEOMETRY, 
        options: ['geometry_type' => 'POINT', 'srid' => 4326]
    )]
    private $point = null;
}

I can see the doctrine.event_subscriber is registered

php bin/console.php debug:container --tag doctrine.event_subscriber

Symfony Container Services Tagged with "doctrine.event_subscriber" Tag
======================================================================

 ------------------------------------------------------ ------------ -------------------------------------------------------------------------- 
  Service ID                                             connection   Class name                                                                
 ------------------------------------------------------ ------------ -------------------------------------------------------------------------- 
  Jsor\Doctrine\PostGIS\Event\ORMSchemaEventSubscriber   default      Jsor\Doctrine\PostGIS\Event\ORMSchemaEventSubscriber  
 ------------------------------------------------------ ------------ -------------------------------------------------------------------------- 

But the index created is of type btree instead of GIST

Indexes:
    "location_pkey" PRIMARY KEY, btree (id)
    "idx_d2ee6cd640f0eb24" btree (center)