Allow Feed view to limit the length of feed items (like teasers)

Just an idea that would be useful:
I like to embed a selection of paragraphs (rich text block entities) as a feed in a page entity, and limit the display of the paragraphs so that users can click ‘read more’ to expand the paragraph.
Another option is to see it as a list of teasers, and the read more link would open up the paragraph in a new window.