When you import stream theme, you should’ve imported WP SHOW POSTS plugins as well, the featured pocasts and latest article sections are using a shortcode generated by WP SHOW POSTS plugin.
You can go to dashboarder > WP show posts, add your new list, then replace the default[shortcode]
with your new list shortcode.
None of the plugins you listed are coming with Stream theme install.
The list of plugins that come with Stream are:
GenerateBlocks
Happyforms (free)
MC4WP: Mailchimp for WordPress
WP Show Posts