By default psalm doesn't recognize return type for cases like this
$object->getRepository(Entity::class)
where $object can be instance of
Doctrine\Common\Persistence\ObjectManager
Symfony\Bridge\Doctrine\RegistryInterface
Doctrine\Common\Persistence\AbstractManagerRegistry
Doctrine\Common\Persistence\ManagerRegistry
repository class from @ORM\Entity(repositoryClass="Doctrine\Common\Persistence\ObjectRepository")
will be returned
Add into your psalm.xml file into <plugins> section line
<plugin filename="vendor/runtothefather/doctrine-psalm-plugin/src/ReturnTypeProvider/GetRepositoryReturnTypeProvider.php"></plugin>