Ive seen an article yesterday when i was searching the web, but im not sure if it was only meant in conjunction with Gsync. But iirc Vsync (kinda) works when forced in NCP, but not when activated in game.
However, in my tests, it didnt lock the frames properly, the frametime was still a bit off, compared to FG off an vsync, the frametime is rock solid. as long as FPS are above the locked framerate of course.
So, not 100% sure, cant find the article right now…
EDIT: RTX 4080 Game Ready Driver Adds Support for G-Sync and V-Sync With DLSS 3 | Tom's Hardware