If you were wondering if the <details> disclosure element, which hides the text on the page by default, is search engine friendly, I am here to tell you that it is. That entire list displayed in the featured snippet is hidden by default. The text is part of the transcript for a dedicated video playback page.
See for yourself: https://coywolf.video/social/10-ways-mastodon-is-better-than-twitter/
Learn more about <details>: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details