Incomplete RSS feeds

I am stuck and would appreciate help. I have a category on my blog (https://www.digitalmediagalaxy.com/category/podcasts) that contains all the posts I’ve categorized as “podcasts”.

But https://www.digitalmediagalaxy.com/category/podcasts/feed lists only the first 10 posts.

I’m confused: where could WordPress be configured to select items for inclusion in a feed? How can I get the RSS feed to include ALL items in the category?

Thanks.