As a 1password and Privacy user I'm really excited to see integration. I just tried it out, pretty neat concept.
Just one thing I noticed though. When I create a card using the 1password extension and have it automatically added to my vault it always notes the card type of Visa in my 1Password vault. Sometime with Privacy when I create new cards they get created as Mastercard (the last two I created today while tested things out with the integration were Mastercard). But in my vault they were are labelled as Visa, I had to manually change them. Not a huge issue, since when autofilling most sites these days don't ask for card type.
1Password Version: Not Provided
Extension Version: 1.22.1
OS Version: MacOS 10.15.6
Sync Type: Not Provided