Adding data-no-lazy do not avoid lazy loading

[db-conception]

Describe the bug
Hi, I add the attribute data-no-lazy on featured image of blog single article. But it's still lazy loaded

To Reproduce
In your child theme add this file 'article.php':

<?php

class Ido_Article {
    public function __construct() {
        add_filter('wp_get_attachment_image_attributes', [$this, 'exclude_lazy_loading_for_post_images'], 5, 3);
    }

    public function exclude_lazy_loading_for_post_images($attr, $attachment, $size) {
        // Vérifie si on est sur une page d'article de blog (post type 'post')
        if (is_single() && get_post_type() === 'post') {
            // Vérifie si l'image a la classe 'attachment-full'
            if (isset($attr['class']) && strpos($attr['class'], 'attachment-full') !== false) {
                var_dump("apply no lazy");
                // Ajoute l'attribut data-no-lazy="1"
                $attr['data-no-lazy'] = '1';
            }
        }
        return $attr;
    }
}

• don't forget to include and instantiate the class in your function.php

Expected behavior
I expect to miss the loading="lazy" on my featured image

Screenshots
https://i.imgur.com/j5BItzb.png
url : https://stg-idonim-staging.kinsta.cloud/les-kits-soutien-gorges/

PS
I was thinking that above viewport line, pictures was automatically excluded of lazy loading

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.
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