If you are a member of V-TIP.COM you can create a rss feed from existing playlist.
Note, it has to be a playlist with audio files you have uploaded to the website.
Our rss feed function, when used properly can generate a feed that is compliant with apple podcasts.
Currently we only allow feeds for audio podcasts.
Visit apple’s website for more information on best practices on creating a podcast and how to validate a feed: https://help.apple.com/itc/podcasts_connect/#/itca5b22233a and here: https://help.apple.com/itc/podcasts_connect/#/itc2b3780e76