@olivierlambert It does show up in 9.0 early release as ID 303a:831a Nabu Casa ZBT-2 so that's a great news.
It still shows up as (2.00) in the PUSB list, but it was much easier than before.
Still needed to modify the /etc/xensource/usb-policy.conf to allow specific vendor/product IDs, followed by xe pusb-list.