put this section into _init()

[ladyada]

this is not part of the reset process? if not, it goes into init()

  setInt1DataReady(true);

  // enable accelerometer and gyro by setting the data rate to non-zero
  // (disabled)
  setAccelDataRate(LSM6DS33_RATE_104_HZ);
  setGyroDataRate(LSM6DS33_RATE_104_HZ);

  delay(10);

[ladyada]

ok after working on LSM6DS33, you should just subclass that object for both the LSM6DSOX - override maybe _init() and make a new repo for the ISM. chat with me when are you are ready to do it