I2c addresses

I’ve read through the dev documentation for a long time but am unable to get a grasp of the i2c addresses. More specifically if they are listed in each driver as that is what I believe I am seeing if I am interpreting this correctly. Is there a master list this is pulled from? Reason being that some sensors have multiple i2c address depending on how the break board is setup (high/low etc) and a few boards I have are proving to be difficult if not impossible to alter the default address but I am unable to get PX4 to recognize and start the respective driver. I have gone through NSH and tried various start, etc but am at loss at this point. I rigged up a quick arduino i2c reader to check functionality of each sensor and all is working and hex codes received I am just unable to get this started on the PX4 side.

Much appreciated!