Getting a custom Raspberry Pi Pico keyboard can be done by tuning in to Reddit and following a user known as Duzitbetter who had actually decided to 3D print the mechanical keyboard circuit inside.

The image supports the Raspberry Pi's Wi-Fi module by default, as well as HDMI, Ethernet, and GPIO ports. However, it doesn't support audio, 3D graphics, the Raspberry Pi touchscreen, or camera.