Use BDU on LSM6DS3(3) FIFO registers?

[renevanee]

The LSM6DS3's datasheet recommends setting BDU=0 for the FIFO's status and data registers, which makes sense in my opinion.

The LSM6DS33's datasheet recommends setting BDU=1 for the same register block, however. I can't find any recommendations for sensor products in the same family.

So does anyone have experience with FIFO reading from these 2 sensors (they are included in the Arduino Nano 33 IOT and Arduino Nano RP2040, respectively) with regard to Block Data Update?