Is there a setting to show out of stock products at the end of the store or category pages?

Hello @Recep,

This request would require customization code and therefore falls outside the scope of our standard support.

However, you may try using one of the following code examples:

function order_out_of_stock_products_last( $query ) {
    if ( $query->is_main_query() && is_shop() || is_archive() && ! is_admin() ) {
        $meta_query = $query->get( 'meta_query' );
        $meta_query[] = array(
            'key' => '_stock_status',
            'compare' => 'EXISTS'
        );
        $query->set( 'meta_query', $meta_query );
        $query->set( 'orderby', 'meta_value' );
        $query->set( 'order', 'ASC' );
        $query->set( 'meta_key', '_stock_status' );
    }
}
add_action( 'pre_get_posts', 'order_out_of_stock_products_last' );

Or:

add_filter( 'woocommerce_products_widget_query_args', function( $query_args ) {

    // Make sure the stock status meta exists
    $meta_query = isset( $query_args['meta_query'] ) ? $query_args['meta_query'] : array();
    $meta_query[] = array(
        'key'     => '_stock_status',
        'compare' => 'EXISTS',
    );
    $query_args['meta_query'] = $meta_query;

    // Order by stock status first, then by date (optional)
    $query_args['orderby'] = array(
        'stock_status' => 'ASC',
        'date'         => 'DESC',
    );

    $query_args['meta_key'] = '_stock_status';

    // Use meta_value sorting explicitly
    $query_args['orderby']  = array( 'meta_value' => 'ASC', 'date' => 'DESC' );

    return $query_args;

}, 999 );

Best regards,
8Theme Team