I'm not sure exactly, but there are several Wynonna Earp comics out there. You might want to check with dedicated comic book stores or online databases for a precise count.
One common theme is the relationships between the characters. For example, the complex relationship between Wynonna and Doc Holliday is often explored in-depth. Another theme is the fight against the supernatural, just like in the show. Fans like to write about how the characters handle different supernatural threats.
Yes, you can come across podcasts specifically centered around the Wynonna Earp comic book. They might cover things like fan theories, comparisons to the TV adaptation, and behind-the-scenes details of the comic's creation.
One great Wynonna Earp fanfic is 'The Ghostly Guardian'. It has an interesting plot where Wynonna is faced with a new type of revenant that has unique powers. Another is 'Earp Sisters' Bond' which focuses on the relationship between Wynonna and Waverly in some really challenging situations.