The location they have that's "well into construction" is SPARC, which is not intended to be a net power production facility. It will host their net gain demons

The location they have that's "well into construction" is SPARC, which is not intended to be a net power production facility. It will host their net gain demonstrator that they intend to have first plasma in next year and target a net gain demonstration in 2027. ARC which they announced siting for and is intended to be their first grid-attached net power provider only just had the location selected so I don't believe its got much construction going on yet. The goal for that plant to be producing power is "early 2030s".