macOS Native Autofill Confusion?

I'm using the latest beta for Mac 8.12.22-15. The release notes say

You can now use 1Password as a macOS AutoFill provider to natively fill and save credentials in Safari and other apps

I am able to toggle 1Password to Autofill from but if I try to autofill anything in Safari I see

Native macOS Autofill is under exploration...

Did someone jump the gun with the release notes because I wasn't expecting to be told it won't work yet?