Get the RSS feed url from an Apple Podcasts url using
id=73801817 curl --silent "https://itunes.apple.com/lookup?id=$id&entity=podcast" | jq -r '.results.feedUrl'
The above should work on Linux and MacOS. You may need to install
id is at the end of the
https://podcasts.apple.com/... url. For example,
https://podcasts.apple.com/us/podcast/behind-the-news-with-doug-henwood/id73801817 has id 73801817.