Depends on what you mean by “working.” DDG-1000 is still kicking around try in my to figure out what to do with itself. DDG(X) is in a requirements development phase. FFG-62 is actually getting built. There are various autonomous surface and sub efforts that may turn into something.

They're also upgrading some Arleigh Burkes (and everything bigger that will stay in service) with SEWIP Block III (EW).

The new hotness is the Constellation-class frigate which chose a mature design to keep costs down. That was until feature creep completely consumed it in record time:

"At one point the Constellation design shared about 85 percent commonality with the original FREMM design, but the alterations have brought that commonality down to under 15 percent, a person familiar with the changes told USNI News."

https://news.usni.org/2024/04/02/constellation-frigate-deliv...

Every single time.