I'm confused, why do you want hardware and what do you want the hardware to do? And, why not use a USB keyboard?
You could use an rpi pico. It has a usb port and there is a software hack to bit bang a second usb port, iirc.
You could use an rpi pico. It has a usb port and there is a software hack to bit bang a second usb port, iirc.
To go one step higher, I am trying to control a mac mini from the keyboard of a macBook.