Apple has finally started selling the Magic Keyboard with Touch ID separately, and with an optional numeric keypad. However, the new keyboard has limited compatibility, is expensive, and only comes in one colour.
https://www.notebookcheck.net/Apple-now-sells-the-Magic-Keyboard-with-Touch-ID-without-an-iMac-but-only-for-Apple-Silicon-hardware.553163.0.html
An expensive keyboard with limited compatibility. Only Apple could do this