Custom post types in main RSS feed – not working?

I’m using two custom post types, “press” and “career”, on my site https://www.rachael-stirling.com/

I have this function added to my functions.php file as I’d like to include those types of posts in my main RSS feed:

function myfeed_request($qv) {
if (isset($qv['feed']))
$qv['post_type'] = 'any';
return $qv;
}
add_filter('request', 'myfeed_request');

It doesn’t work though. I’m still only seeing my “post” posts in the RSS, not “career” or “press”.

Does anyone know what I might be doing wrong? I’ve tried numerous functions from all over the web and still they are not showing up. ??