With displays like these, it’s either parallel or SPI. Try to find a chip in the kapton circuit, that is the actual display driver.
Try to find out the FPC pinout, there should be two pins for backlight, find out of there’s any GND, etc… my gut says this is some kind of SPI based controller, 24 pins is too little for a parallel one.
Man, getting accepted by Polaris was fun!