BuddyPress.org

Here’s the documentation for the various filters available for the Groups Loop: https://codex.buddypress.org/developer-docs/custom-buddypress-loops/the-groups-loop/

There’s a number of ways to skin it. You could do 2 loops on the same page and just check each group to see if it should be in the featured list of groups or not. The other is to use one of the above filters. groups-loop.php is the file you’ll probably want to look at.