for the schematic on the display it works for both 5 and 3.3 volts
Can you give me a link to the schematic?
I’m using the S3 sense with the camera
Have you ever run it with just the S3 without the camera? I have run it with just the S3 and display.
Or have you ever run it with different GPIO ports?
edit
According to the schematic, the VCC voltage and the port voltage must be the same.
Specifications
Operating voltage: 3.3V/5V (Please ensure that the power supply voltage and logic voltage are the same, otherwise it will not work properly.)