My one has two thunderbolt 3 connections plus three usb cThere are two currently listed on LG website: the old one (no USB), and the not-so-old one (has USB.)
Amazon had some of the old ones in stock last week. But they disappear regularly. LG's own website usually shows the old one out of stock.
No one seems to want 24" monitors anymore and they are getting difficult to find (other than 1080p for office work at cheap-ass business.)