Why doesn’t Loco recognize these strings?

I have dynamic text that Loco Translate isn’t recognizing.
I added the text myself to a plugin file I downloaded from the WordPress repository.
I ran several different tests; I’ll only include two here to keep it brief.

This is the first one I tried:

// We rendered the requested dynamic title.

 echo '<h2 class="product-results-page-title" style="margin-bottom: 30px; text-align: left;">';
        echo sprintf(
            /* translators: 1: cantidad de productos, 2: lista de alérgenos */
            /* translators: %$s: Number of products found */
            _n(
                'This is the %1$s product without %2$s',
                'These are the %1$s products without %2$s',
                $count,
                'product-search-for-woocommerce'
            ),
            '<strong>' . (int) $count . '</strong>',
            '<span class="product-search-name">' . esc_html($list_text) . '</span>'
        );
        echo '</h2>';
echo '</h2>';

It doesn’t recognize this one

// 1. We prepared the text to be translated in isolation so that Loco could see it clearly.

$texto_singular = 'This is the %1$s product without %2$s';

$texto_plural = 'These are the %1$s products without %2$s';

// 2. We obtain the translation (using the $count variable for the plural)

$mensaje_traducido = _n( $texto_singular, $texto_plural, (int) $count, 'product-search-for-woocommerce' );

// 3. We render safely

echo '<h2 class="product-results-page-title" style="margin-bottom: 30px; text-align: left;">';

echo sprintf(

$mensaje_traducido,

'<strong>' . (int) $count . '</strong>',

'<span class="product-search-name">' . esc_html( $list_text ) . '</span>'

);

echo '</h2>';

It doesn’t recognize this one either.

What am I doing wrong?