As illustrated by the screenshot below, iCloud Passwords extension does not work. This window should trigger a code popup on the device and then you write it in the displayed extension window.
The correct behaviour should be :
Technical Details :
Orion Version : Version 0.99.124.4.5-rc (WebKit 6188.8.131.52.1)
macOS Version : macOS Sonoma 14.0 Beta (23A5286i)
MacBook Model : 13-inch MacBook Pro M1 2020 16GB RAM