That's an OLED display panel, probably a 0.96 inch one. Also requires logic behind it to get the display you're seeing in that picture. Could be an arduino or STM32 board doing that duty.
I can't tell from this picture, but the installer may have swapped out the original channel selector with an optical encoder. Apparently those are easier to work with for some folks.
Don't know if anyone is selling those as kits to install in your radio, but all the parts are available online. You'll have to a little bit (or a lot) of programming to get it working together.
Oh, and soldering. Lots of soldering.