Hello daniel74,
Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you have questions about how to stop Podcasts from accessing your Contacts app. As outlined in the article at the top of the page:
"Remove shared content
- Go to the Shared with You section of the app.
- Touch and hold the thumbnail for the content, such as a News article or a Podcast.
- Tap Remove.
Depending on the app, you might see different options for removing the shared content.
To customize the shared content that you see in Shared with You in the corresponding apps:
- Go to Settings > Messages.
- Tap Shared with You.
- Choose the apps where you want to see shared content."
We hope this helps.
Cheers!