I recently picked up an Orange Pi Zero 3 and have been trying to figure out how to get the i2c pins working on the GPIO.  The pinout shows pins 2 and 3 (229 and 228 according to the orange pi version of wiringPi) being used to i2c-3.  The downloadable images seem to be hodge-podge with the orange-pi-os version based on arch linux. But their instructions appears to be based on earlier orange pi models that had an Orange Pi OS based on armbian which included a 'orangepi-config' command similar to