Static category pages and RSS feed

I am using static category pages with the following code:

add_filter('request', function( array $query_vars ) {
    if ( is_admin() ) {
        return $query_vars;
    }

    if ( isset( $query_vars['category_name'] ) ) {
        $pagename = $query_vars['category_name'];

        $query_vars = array( 'pagename' => "$pagename" );
    }

    return $query_vars;
} );

There is a problem with the RSS feed though. Normally the feed would show with SITEURL/category/feed but it's not the case with static category pages. Need the feed so my client can apply for Google News.

Any solutions?