Sure, for nuclear to help not reach the 1.5°C threshold it should have been built decades ago.
For nuclear to help not reach the 2°C threshold it can be built now. But surely in a few decades it will also take too long to build.
Right now there are new fossil fuel plants being built, I think nuclear is a better alternative than that.
They use a custom encryption protocol and there's been bugs that look like a backdoor.
https://grapheneos.social/@GrapheneOS/113020871978942265