Why doesn't Apple make a standalone Touch ID?

Apple's protective approach to Touch ID hardware has led to the absence of this feature in non-Apple mechanical keyboards. A workaround involves disassembling an Apple Magic Keyboard with Touch ID, extracting the Touch ID component, and integrating it into a 3D-printed box along with the keyboard's logic board. This process, though intricate and time-consuming, has been documented in a video. The author questions why Apple doesn't offer a standalone Touch ID device, suggesting that such a product could be a viable market option.