Add upvote capability to your listing
Your Airtable field must be of type Integer/Number, or else the upvote will not work.
Open the listing editor by hovering over the listing and selecting Edit Listing
In the Listing View builder, click on Fields
Expand the Call To Action Button field.
In the Action option, select Upvote
To sort your listing by upvote counts, view the docs here: Airtable listing