Err, sorry FERC.
Texas appears to finally submitting to DOE oversight by interconnecting ERCOT with the rest of the country.
https://electrek.co/2024/10/03/hell-froze-over-in-texas-us-grid-first-time/
Discussion
Ah, I guess I was misinformed. FERC allows DC ties without triggering FERC oversight (though it seems like an obvious thing for a future overzealous federal government to change).