It sounds like a refurbishment of a plant that was working just fine until 2019, not a new build of a design where you don't even know if it can be built.
(The originally submitted Vogtle-3/4 design could not be built)
In fact, last I checked they had already planned this refurbishment, but could not obtain the funds to do it, and thus shut down the plant instead.
¯\_(ツ)_/¯
