Hi Paul,
Thanks for reporting this.
Since you're using a Windows Insider Preview build, the Account flyout and the Microsoft 365 subscription information in Settings may be affected by changes to, or temporary issues with, Insider features. These features can also be enabled or disabled as Microsoft continues testing them.
Could you please provide:
Your Windows Insider channel (Dev, Beta, Canary, etc.)
The exact Windows build number (Settings → System → About)
Whether the issue persists after restarting Windows
Whether both devices are running the same Insider build
If the feature disappeared on multiple devices running the same build, that information would be particularly useful in determining whether this is build-related.
If you believe this is an Insider regression, you can also submit it through the Feedback Hub so the relevant team can investigate it.