In my 1PW I have a work vault from 1PW.com and then I have my iCloud vault that I've used since that feature was introduced.
In Safari, when filling from the web extension, the only account / items that are appearing are from the 1PW.com account. No items from my iCloud vault are appearing in the extension.
I don't see any place to control what vaults appear in the extension. This was never an issue before in the pre-web extension world.
1Password Version: 7.9.3
Extension Version: Latest
OS Version: iPadOS 15.1