Bitcraze Multirangerdeck

Hello,
I have a crazyflie2.1 drone where I loaded PX4-Autopilot and I want to connect to it a bitcraze Multi Ranger Deck.
The Multi Ranger Deck has 5 vl53l1x sensors which are already developed in the PX4 firmware but they are controlled by an
hardware multiplexer named pca9534, how can I implement this multiplexer in the PX4 firmware allowing me to read data
from the sensors? P.S. This multiplexer is already implemented in crazyflie firmware but not in PX4