In a feed's options, you can select the Show people who liked a post option in order to display in the app the attendees who liked a post.
This means that attendees can tap/click on the number of likes for any post on the feed, and see a list of who liked the post:
The attendee information displayed in this list can be modified. To do so go to Feed > Preferences > Likes list appearance:
Here the three lines of information that can be displayed for attendees can be modified.
Simply enter the user metadata you want to display. If the user data is populated in the user's profile, it will appear in the list.
Please note that private user metadata cannot be displayed here.