It was definitely an issue with the ASC.
I own V collection 8 but not 9, it gives the option to install my whole V collection and when I did so, none of the synths completed the Logic Plugin verification process.
I uninstalled and reinstalled and got the exact same issue again. That's when I first made this post.
When I uninstalled all of them (via the ASC, each one individually via the details tab in my V Collection bundle section) and then installed them individually, it worked fine.
For all but the updated instruments of course.
So I'm guessing that somehow the V Collection 8 bundle, if you choose the option to install the whole thing, rather than individual instruments, links to older files, or older dependencies that don't run correctly under Ventura. But then when installing anything individually, I guess it grabs the latest version, regardless of which version of V Collection you own.