At this time, the PS5 firmware update has not been released. To use the Arctis Pro Wireless with the PS5 until the firmware update is released, you'll need to have the transmitter set to "PS4"
Once the firmware is released, you'll need to plug the Arctis Pro Wireless into a PC or Mac running the SteelSeries Engine, from there the SteelSeries Engine will show a banner underneath of the product prompting for a firmware update.
Stay tuned to Tech Blog ( http://techblog.steelseries.com/ ) and to your SSE client to follow all of our exciting new features and bug fixes in our SteelSeries Engine updates!