How to add sidebar to Isola theme? [closed]

Go to the functions.php file inside of your theme and search for register_sidebar it could look like this:

function isola_widgets_init() {
    register_sidebar( array(
        'name'          => esc_html__( 'Sidebar', 'isola' ),
        'id'            => 'sidebar-1',
        'description'   => '',
        'before_widget' => '<aside id="%1$s" class="widget %2$s">',
        'after_widget'  => '</aside>',
        'before_title'  => '<h2 class="widget-title">',
        'after_title'   => '</h2>',
    ));
}
add_action( 'widgets_init', 'isola_widgets_init' );

and change it to e.g.:

function isola_widgets_init() {
    register_sidebar( array(
        'name'          => esc_html__( 'Sidebar', 'isola' ),
        'id'            => 'sidebar-1',
        'description'   => '',
        'before_widget' => '<aside id="%1$s" class="widget %2$s">',
        'after_widget'  => '</aside>',
        'before_title'  => '<h2 class="widget-title">',
        'after_title'   => '</h2>',
    ) );
    register_sidebar( array(
        'name'          => esc_html__( 'Sidebar 2', 'isola' ),
        'id'            => 'sidebar-2',
        'description'   => '',
        'before_widget' => '<aside id="%1$s" class="widget %2$s">',
        'after_widget'  => '</aside>',
        'before_title'  => '<h2 class="widget-title">',
        'after_title'   => '</h2>',
    ) );
}
add_action( 'widgets_init', 'isola_widgets_init' );