Hide Sidefeed for Spesific Page || Category and 404 Page for Example

/* Hide Sidefeed for Spesific Page || Category and 404 Page for Example */
function hide_sidefeed_for_spesific_page( $flag ) {
    if ( is_category() || is_404() ) { /* If is Category or 404 Page */
        $flag = false;
    }
    return $flag;
}
function hide_sidefeed_for_spesific_page_css() {
    $sidefeed = new \JNews\Sidefeed\Sidefeed();
    if ( ! $sidefeed->can_render() ) {
        echo '<style>.jeg_sidecontent .jeg_viewport { margin-left: unset; }</style>';
    }
}
add_action(
    'init',
    function() {
        add_filter( 'jnews_enable_sidefeed', 'hide_sidefeed_for_spesific_page' );
        add_action( 'wp_head', 'hide_sidefeed_for_spesific_page_css' );
    }
);