Showing the content to bots that a typical user would need to manually load via "Show more"?

Imagine that you have a social profile on some page

After that imagine, that other people follow you and these people are shown as a list somewhere on the page (lot of avatars)

For the UX & server requirements, a typical user sees only 10 followers. To see more he needs to click "see more" and the content would be autoloaded from the server.

For the SEO I should return something more, maybe some sitemap with the followers, or other XML source. I am not sure. Technically I can return the followers in a normal way since bots does not load images to my knowledge and the server won't get hit by that