@D.I Johnson
I checked the Passwords app.
Unfortunately no keychain passwords or data to be found.
Can’t import keychains files into the Passwords app either.
All keychain files are greyed out and can’t be selected.
@kaz-k
I still have my keychain data and passwords stored on my old MacBook Pro
with MacOS 10.13.6 High Sierra installed.
Haven’t found a way yet, to save my keychain to iCloud, even activated,
the data is nowhere to be found in my iCloud ?
Might be a temporary issue ?
Finally I managed to open one of my keychain files creating a new keychain
with a new password ? I can see all my keychain items.
Unfortunately, Show password does not work, Access to this item is restricted.
The provided password did not unlock this keychain, or access has been limited to a particular user account.
Unlocking via Terminal did not work either.
security unlock-keychain