Seems odd too. I'm not sure why it wouldn't support Nvidia cards. The open-source Nouveau drivers for Nvidia cards has been in the mainline kernel for years now. Most Nvidia cards just work out of the box now in Linux.
For AMD, lots of people game on the community open-source drivers in Mesa. Presumably the same could be true for NVIDIA in the future.
See: https://www.phoronix.com/news/NVIDIA-Turing-Firmware-2023
Granted I don't have a recent GPU (1050Ti), but nouveau has been unable to run plasma with compositing enabled reliably for more than about 10 days straight on that system. Sometimes I can clear up the issues by forcing a mode-switch, othertimes it requires I restart Xorg, othertimes a reboot is needed. I should note I gave up on it in late 2021, so things may have improved in that time.