iMessage iCloud sync not showing in iMessage preferences
According to Keep all your messages in iCloud - Apple Support to enable iMessage for iCloud on Mac you go into iMessage preferences and check Enable Messages in iCloud, as shown here
However, the check does not appear on my system:
Is this a bug or a misconfiguration? I don't have an iPhone so maybe that's what it is?
MacBook Air 13", macOS 10.15