Hello,
I just wanted to throw in that for a hobby project I interfaced Solomon Systech's SSD1331 (96x64 pixel) color OLED display and created an SPI-based driver for it. Since it may be useful for others, too, I have uploaded the sources to https://nrf52-ssd1331.sourceforge.io/, along with SES project files for nRF52832 and nRF52840. Plus, there you will also find screenshots and a link to a video to see what you can do with the driver.
Cheers,
Tamas