Pat Hawks

dirtysuds

Once activated, Gallery posts will have an excerpt that is a row of thumbnail images from that post, rather than some (often not descriptive) text. 
This excerpt should appear in your archive pages, and perhaps elsewhere, depending on your theme.
Note: The post must actually have the post type ‘Gallery’. It cannot just be a post with a gallery in it.

Gallery Excerpt

Replace the excerpt for posts with the post type 'Gallery' to a row of images from the post.

Srawan Paudel

A plugin that displays media items (images & videos) in a carousel fetched from an ACF field.

Media Carousel ACF Field

Displays images and videos in a carousel fetched from Advanced Custom Fields (ACF).

Gallery Excerpt vs Media Carousel ACF Field