Great work!
I was looking for a simple hello_world application built with ESP_IDF for my Waveshare board. This board has a RM67162 display (536x240), and rotation has to be set to 90 just like you have. Your code works great right out of the box!
Ref:
https://www.waveshare.com/wiki/ESP32-S3-AMOLED-1.91