add_action(‘init’) not work

I believe init is too early to determine is_page(). Try a later hook, like template_redirect.

function wpse_344136_user_logged_in(){
    if ( is_user_logged_in() && is_page( 'login' ) ){
        wp_redirect( home_url() );
        exit;
    }
}
add_action( 'template_redirect', 'wpse_344136_user_logged_in' );