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If I was going to port my ISS code to the ESP32 using the ESP-IDF framework, I’d need a driver for the SSD1306 OLED display.  It does seem like some people have been down this path before.  I haven’t tried any of the following, but a little quick googling revealed some promising links:

https://github.com/yanbe/ssd1306-esp-idf-i2c
https://github.com/imxieyi/esp32-i2c-ssd1306-oled
https://github.com/nkolban/esp32-snippets/tree/master/hardware/displays/U8G2

The last is perhaps most interesting, as the UG8 library is commonly used in Arduino sketches.