I have a bit of a strange question. But is it possible to somehow display the hashing process onto an external display?
What sort of display did you have in mind?
The bfgminer api exposes most of the useful information so I suppose something like attaching an Arduino with a 7-segment display to the USB port and having a script to feed it for example the hashrate from the api could be one simple option. Replace that 7-segment display with some commonly used small OLED and you could fit a little bit more info there. Replace the Arduino with a ESP8266 or ESP32 and it could read the bfgminer api by itself without needing to be attached to the USB port.