We don't provide a standalone layout because normally you would build this into the theme you are developing or using. Each theme uses it's own CSS and potentially it's own CSS framework so it doesn't make sense to bundle something like that.
Tailwind uses semantic classnames so it makes it very easy to see what's going on, and how to produce that output. It's really just a wrapper with flexbox, and then each element is set to 1/3 width.
You can dump the image and meta objects to see what's available:
Hello, last week i purchased the instagram-feed premium plugin, but still have a few questions.