Hi AndyHewitt1-
I'm Kevin B. Windows user like you. I do apologize for the inconvenience, let me help you sort things out.
Microsoft usually offers the upgrade to those devices Microsoft believes are the most likely to successfully install the upgrade. If the computer passes the hardware requirements, windows updates will offer the upgrade in stages until such time that device is ready to install the upgrade.
There is no announcement yet if Microsoft will add more CPU on the list, we are all waiting and hoping that new CPU might be added on the list.
You can reach out to your computer manufacturer to check/upgrade your processor to one that support Windows 11.
You can also stay with Windows 10 as it is still supported until 2025.
Hope this will help and have a blessed day!
Thanks,
Kevin B.
Independent Advisor