As the name suggests this allows you to search for a pod cast in a good range of topics.
Libre Lounge is another podcast that has covered different aspects of the Fediverse, this includes some of the more technical aspects including a multipart discussion on Activity Pub. Activity pub is one of the protocols that allows posts to be federated across the network.
You can find the Devon and Cornwall GNU / Linux user group on the fediverse at https://social.isurf.ca/profile/dcglug
Or search using firstname.lastname@example.org