The example file is missing this crucial detail. From what I can tell so far, the Accellerometer data, and the Gyro data is working fine, as per that example at
https://github.com/m5stack/M5StickCPlus2/blob/master/examples/Basic/imu/imu.ino
and that's all working great.

but there's an obvious missing chunk in the example code related to rotational position, and so I looked at the earlier (M5StickCPlus) for clues
https://github.com/m5stack/M5StickC-Plus/blob/master/examples/Basics/IMU/IMU.ino

Now here we have a totally different approach, and so I blundered through migrating it a bit, past several errors - until I realised that my Plus2 is very different and relies more on M5Unified

So I took a look at the integrated example there (in /M5Unified) and it's all very familiar from the Plus2 example except ...
https://github.com/m5stack/M5Unified/blob/master/examples/Basic/Imu/Imu.ino
at line 258 where the "mag" vars and array is clearly referenced, where it's missing from the Plus2 example.

So on my Plus2 if I do something like is implied at line 258 of that file (IE:)

M5.Lcd.printf("ACCEL %0.2f %0.2f %0.2f\r\n", data.accel.x, data.accel.y, data.accel.z);
M5.Lcd.printf("GYRO %0.2f %0.2f %0.2f\r\n", data.gyro.x, data.gyro.y, data.gyro.z);
M5.Lcd.printf("MAG %0.2f %0.2f %0.2f\r\n", data.mag.x, data.mag.y, data.mag.z); // this is the problem

what I get is something very like the below image, where no rotational attitude data is available.

So, can you advise where I'm going wrong here? How do I access the equivalent of line 65 in the older example

M5.Lcd.printf(" %5.2f %5.2f %5.2f ", pitch, roll, yaw);

Where am I going wrong here?

thanks in advance!