Podcast not adding to library Is this a premium/listening issue or am I doing something wrong?

[Senkoau]

Plan: Free

Country: Australia

Device: PC

Version: Windows 10

I'm currently looking at spotify as a podcast platform as I'm listening to a few. The first one I selected following and it appears in my library podcasts fine. The second one same producer however is following but doesn't appear in my library and I have to search for it each time.  I have not currently listened to the second one's episodes as I'm catching up on the first and just wanted to mark it for later.

Do I need to play a full episode for a followed podcast to appear in my library, are they limited to 1 podcast only unless premium or am I doing something wrong that's preventing the second one from showing up in my podcasts?