Hi msu,
1KOhm I2C(SCL, SDA) pull-up resistor have been soldered onto the BM350 shuttle board 3.0 https://www.bosch-sensortec.com/media/boschsensortec/downloads/shuttle_board_flyer/application_board_3_1/bst-bmm350-sf000.pdf The VDD domain does not support 3.3V power supply.
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