Hide children categories from a plugin / shortcode

My theme comes with an addon plugin that include some visual constructor element.

They display the products on my homepage, with categories filter. But I want to exclude subcategories products (children).

I already tried to add "include_children => false" in what I suppose to be the query, but it has no incidence on the code.

Here is the code of the bloc :

function supro_products( $atts, $content ) {

    $atts = shortcode_atts(

        array(

            'title'            => '',

            'subtitle'         => '',

            'style'            => '1',

            'limit'            => 6,

            'columns'          => 3,

            'm_columns'        => 1,

            'orderby'          => 'title',

            'order'            => 'ASC',

            'filter'           => 'category',

            'show_all_product' => '1',

            'all_product_text' => esc_html__( 'All Products', 'supro' ),

            'tabs'             => '',

            'category'         => '',

            'link'             => '',

            'load_more'        => false,

            'btn_style'        => 'border-bottom',

            'css_animation'    => '',

            'el_class'         => '',

        ), $atts

    );



    if ( ! $this->wc_actived ) {

        return;

    }



    $css_class = array(

        'supro-products-grid supro-products',

        'style-' . $atts['style'],

        $atts['btn_style'],

        $this->get_css_animation( $atts['css_animation'] ),

        'mobile-columns-' . $atts['m_columns'],

        $atts['el_class']

    );



    if ( $atts['load_more'] ) {

        $css_class[] = 'load-more-enabled';

    }



    $output = array();

    $title  = '';

    $filter = array();

    $type   = 'products';

    $attr   = array();



    $product_args = array(

        'limit'     => $atts['limit'],

        'columns'   => $atts['columns'],

        'page'      => 1,

        'orderby'   => $atts['orderby'],

        'order'     => $atts['order'],

        'category'  => '',

        'load_more' => $atts['load_more'],

    );



    $tabs = vc_param_group_parse_atts( $atts['tabs'] );



    if ( $atts['title'] ) {

        $title = sprintf( '<h3 class="title">%s</h3>', $atts['title'] );

    }



    if ( $atts['subtitle'] ) {

        $title .= sprintf( '<div class="subtitle">%s</div>', $atts['subtitle'] );

    }



    if ( $title ) {

        $title = '<div class="section-title">' . $title . '</div>';

    }



    if ( $atts['filter'] == 'category' ) {

        $attr = array(

            'limit'   => intval( $atts['limit'] ),

            'columns' => intval( $atts['columns'] ),

            'orderby' => $atts['orderby'],

            'order'   => $atts['order'],

        );



        if ( intval( $atts['show_all_product'] ) ) {

            $filter[] = sprintf(

                '<li class="active" data-filter="%s">%s</li>',

                $atts['category'] ? $atts['category'] : '',

                $atts['all_product_text']

            );

        } else {

            if ( $atts['category'] ) {

                $cats                     = explode( ',', $atts['category'] );

                $product_args['category'] = $cats[0];



            } else {

                $terms                    = get_terms( 'product_cat' );

                $empty_terms              = array();

                $new_terms                = array_merge( $terms, $empty_terms );

                $product_args['category'] = $new_terms[0]->slug;

            }

        }



        if ( $atts['category'] ) {

            $cats = explode( ',', $atts['category'] );



            foreach ( $cats as $cat ) {

                $cat      = get_term_by( 'slug', $cat, 'product_cat' );

                $filter[] = sprintf( '<li class="" data-filter="%s">%s</li>', esc_attr( $cat->slug ), esc_html( $cat->name ) );

            }

        } else {

            $terms = get_terms( 'product_cat' );



            foreach ( $terms as $term ) {

                $filter[] = sprintf( '<li class="" data-filter="%s">%s</li>', esc_attr( $term->slug ), esc_html( $term->name ) );

            }

        }



    } else {

        $product_args['category'] = $atts['category'];

        $css_class[]              = 'filter-by-group';



        if ( $tabs ) {

            $type = $tabs[0]['products'];



            $i = 0;

            foreach ( $tabs as $tab ) {

                $tab_attr = array(

                    'limit'   => intval( $atts['limit'] ),

                    'columns' => intval( $atts['columns'] ),

                    'orderby' => isset( $tab['orderby'] ) ? $tab['orderby'] : $atts['orderby'],

                    'order'   => isset( $tab['order'] ) ? $tab['order'] : $atts['order'],

                );

                if ( isset( $tab['title'] ) ) {

                    $filter[] = sprintf( '<li class="" data-filter="%s" data-attr="%s">%s</li>', esc_attr( $tab['products'] ), esc_attr( json_encode( $tab_attr ) ), esc_html( $tab['title'] ) );

                }



                if ( $i == 0 ) {

                    $atts['orderby'] = isset( $tab['orderby'] ) ? $tab['orderby'] : $atts['orderby'];

                    $atts['order']   = isset( $tab['order'] ) ? $tab['order'] : $atts['order'];

                }



                $i ++;

            }

        }

    }



    $link = '';



    if ( $atts['link'] && $atts['style'] == '3' ) {

        $link = '<div class="product-btn">' . $this->get_vc_link( $atts, '' ) . '</div>';

    }



    $filter_html = '<ul class="nav-filter filter">' . implode( "n", $filter ) . '</ul>';



    $output[] = $atts['style'] == '3' ? $title : '';

    $output[] = '<div class="product-header">';

    $output[] = $atts['style'] != '3' ? $title : '';

    $output[] = $filter_html;

    $output[] = $link;

    $output[] = '</div>';

    $output[] = '<div class="product-wrapper">';

    $output[] = '<div class="product-loading"><span class="supro-loader"></span></div>';

    $output[] = $this->get_wc_products( $product_args, $type );

    $output[] = '</div>';



    return sprintf(

        '<div class="%s" data-attr="%s" data-load_more="%s" data-nonce="%s">%s</div>',

        esc_attr( implode( ' ', $css_class ) ),

        esc_attr( json_encode( $attr ) ),

        esc_attr( $atts['load_more'] ),

        esc_attr( wp_create_nonce( 'supro_get_products' ) ),

        implode( '', $output )

    );

}

My two questions are :

• how to hide all subcategory products
• is it possible to make it thru functions.php ? Or should I overwrite the plugin Code ? Can I for example duplicate this bloc, with a new name in my child theme directly ?