That interface doesn’t have to be special, and [Dakhnod] is here to show us that it can be done with an ESP32 microcontroller through its USB interface. The linked repository doesn’t tell us ...

The ESP32 is lacking this advanced feature so the USB needs to be cobbled together ... it’s easily able to handle a keyboard or mouse. This might be a more cost-effective way of doing something ...

The new LilyGo T-Deck Pro is another mobile dev kit with a similar design and the same ESP32 dual-core processor ... that was positioned above the keyboard on the earlier model.