Windows 10 End of Support - October 14

[Wainuitech]

Windows 10 ESU is valued at $30 USD per device and can be purchased directly through the Microsoft Store using the built-in tool available in Settings on eligible Windows 10 devices. To help customers stay protected or move to a new device, ESU includes multiple enrollment paths—some at no additional cost:

• Sync your PC’s settings and apps to help you move more easily to a new Windows 11 device.
  
• Redeem 1,000 Microsoft Rewards points.
  
• Pay $30 USD.
  

So looks like at the least you need to be signed into a MS account rather than a local account, so you can "Sync your PC’s settings and apps "

All the ones I have seen, you have to run Windows updates manually, sometimes several times, before the "Enroll Now" option appears ( if its not showing already), it's only a small blue link on the left of the Windows update. Once you have the Option, then you sign into a MS Account, the actual Computer doesn't have to be signed in.  

On saying that, I do have an AIO that's not showing the option, and that's right up to date.