This was confirmed on the official blog.
Sony has updated the PS5 Q&A post that it posted back in early November. In the “More Information” section, there was a question about support for variable frame rate (VRR), a technology that allows the display to adjust its refresh rate depending on the metric that the console “gives”.
The company has confirmed that the PlayStation 5 supports VRR over HDMI 2.1 in hardware, but this feature will only become available with a firmware update. Exactly when this system patch will be released is not specified.
Sony has announced VRR support on the PS5 before, but didn’t say it would require a dedicated update. At the same time, Xbox Series X | S support variable frame rates at the start. The technology avoids image tearing and requires a compatible display to work.