Hey jnFromMO,
Thanks for using Apple Support Communities! I understand you have some questions about PodCasts an macOS Catalina. There have been some changes with media content, and I am happy to provide some information to help.
With macOS Catalina, Finder is where you can manage and sync content on your iPod now. You will also find your podcasts in the App Podcasts app. You can see about that, and other changes with iTunes and macOS Catalina here: What happened to iTunes
This can also help with syncing using Finder: Use the Finder to sync your iPhone, iPad, or iPod with your computer
Thanks again, and have a great day!