Nvidia isn’t really fully supported on Tumbleweed so you might have to wait until the kernel gets bumped to a new version or a new version of the Nvidia driver comes out.
If you don’t want to wait that long what you might do is download kernel 5.14-2 from here https://download.opensuse.org/history/20210922/tumbleweed/repo/oss/x86_64/
You should then be able to downgrade the kernel and utilize the current Nvidia driver from the repo if you’re okay with that.
Or you could try following this guide.