The subscribe functionality is actually implemented in our widget. The thing with podcasts is that they are often hosted on several different podcast platforms at a time, such as Google podcasts or Apple podcasts.
To allow your users to subscribe to your podcast at the platform they regularly use, we have implemented Buttons section on Tracks tab of the widget’s settings. You need to add as many source links as you have in this section, to let your visitors click on the link they usually go to and subscribe to your podcast.
We hope this explains things!