Compatibility STEVAL-MKI227KA Arduino Mirco

[BapDBD]

Hello,
I'm working on an IMU project. I need to measure pitch/roll/yaw rotation in quaternions.
For my first test, I am using a STEVAL-MKI227KA connected to an Arduino micro, which already allows me to extract the quaternions.I send the data via I²C.
My first question is, do you know if the two are compatible?

I am using this Arduino library, https://github.com/stm32duino/LSM6DSV16X, to communicate between my Arduino and my devBoard. (I had to change the float_t to float to make it work.)

With this library, I only get the same value regardless of my rotation: Quaternion: 0.7562, -0.0055, 0.0001, 0.6543
Have you ever had this problem?

Thank you