Shownotes in a Collapsible

Hey guys,

we are using the Podlove Publisher and the Podlove Web Player for our Podcast “Hinter den Zeilen”:

Because we are using a lot of text and links in our shownotes, the display of every episode on our website is very long and needs a lot of scrolling (especially on mobile). We would like to put our shownotes in a collapsible, so that the users can just fold and unfold the shownotes. The Podcast Lage der Nation is doing this for example:

I am guessing that we can do this by Templating, but I dont know how to do it. Can somebody help us?