There’s nothing in the release notes about DLSS 4 ( Sim Update 2 Beta (1.4.7.0) Release Notes - March 25, 2025 - Sim Update 2 Beta | MSFS 2024 / Beta News - Microsoft Flight Simulator Forums) though they did indicate on one of the developer streams SU2 would implement DLSS4 (at some point, who knows?).
Could you elaborate a little more on how/why you came to this conclusion?
I downgraded to 566.36 to restore usable 2024 performance (572.x drivers would lock up the game in free flight), but might upgrade again if they are supporting it properly. Or maybe wait for NVidia to release some more stable drivers, as the issues are bigger than MSFS it seems. https://www.reddit.com/r/hardware/comments/1jhkzxo/psa_nvidia_widespread_black_screen_or_hard_os/
As per usual, some people have issues and some don’t though. Silicon and driver lottery!