Post type get short code with category slug (working 100%)

function faq_loops($atts) {
    // Default attributes.
    $default = array(
        'category' => '',
    );
    // Merge user-defined attributes with defaults.
    $button_attrs = shortcode_atts($default, $atts);

    // Argument to fetch FAQs based on category.
    $arg = array(
        'post_type' => 'faqs',
        'posts_per_page' => -1,
        'tax_query' => array(
            array(
                'taxonomy' => 'faqs_category',
                'field'    => 'slug',
                'terms'    => $button_attrs['category'], // Use category attribute passed in shortcode
                // 'operator' => 'IN',
            ),
        ),
    );
// print_r($arg);
    // Display FAQs
    $faqsPost = new WP_Query($arg);

    ?>
    <div id="mainfaqs">
        <?php if ($faqsPost->have_posts()) : ?>
            <?php while ($faqsPost->have_posts()) : $faqsPost->the_post(); ?>
                <h2><?php the_title(); ?></h2>
                <p><?php the_content(); ?></p>
            <?php endwhile; ?>
        <?php else : ?>
            <p>No FAQs found in this category.</p>
        <?php endif; ?>
    </div>
    <?php
    wp_reset_postdata();
}
add_shortcode('mainfaqs', 'faq_loops');

// pass shortcode like this: [mainfaqs category="mainhome"]