Do you have a pointer to the release notes for node where it mentions adding PQ?

They now vendor OpenSSL 3.5 and benefit from the new default groups:

openssl genpkey -algorithm ed25519 -out key.pem
openssl req -new -x509 -key key.pem -out cert.pem -subj "/"

// server.js
import { createServer } from "tls";
import { readFileSync } from "fs";

createServer({
  key: readFileSync("key.pem"),
  cert: readFileSync("cert.pem"),
  // You can also configure the new groups by name
  // Node passes this to SSL_CTX_set1_curves_list
  // ecdhCurve: "SecP384r1MLKEM1024:X25519MLKEM768",
}, (socket) => {
  socket.on("error", console.error);
}).listen(16173, () => {
  console.log("listening");
});

node server.js &
# listening

openssl -version # OpenSSL 3.5.1 1 Jul 2025...

openssl s_client -connect localhost:16173 -brief -no-interactive
# ...
# Negotiated TLS1.3 group: X25519MLKEM768

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