Never tried full ARA. Always use it in Bridge mode. So I tested it now. Latest Nuendo 14. Latest beta Synth V. Followed what is written in the manual here
https://sv2.docs.dreamtonics.com/en/full-ara
But to be honest, that’s probably why I’ve never tried it. I find the whole instruction manual strange. Whatever is supposed to happen doesn’t happen anyway.
P.S. See also here in the Nuendo Forum
P.PS.
Now I was curious to see what Full ARA Mode looks like. So I started Cubase 13. And sure enough, it worked right away.
And yes, now I’m annoyed too that it doesn’t work in Nuendo.