Samsung's Galaxy Note 20 Ultra features is the first to feature Samsung Display's 'Adaptive Frequency' technology. The company's display division revealed the details as it moved to make the tech available to other OEMs.
https://www.notebookcheck.net/The-Galaxy-Note-20-Ultra-display-is-the-first-to-use-Samsung-s-new-variable-rate-refresh-tech.485237.0.html