Question about the Multifunctional Environmental Sensor

Hi, I was wondering if there's any way I can read the raw registers from the onboard sensors? Looking at the datasheet, it looks like they are connected to a separate microcontroller.

I was hoping to calculate the UV index, to which the LTR-390UV-01 datasheet provides the following formula (pg 24):

where
UV Sensor Count is the 20-bit value read from registers 0x10-0x12.
UV Sensitivity is the value dependent on Gain and Integration Time (e.g., 2300 Counts/UVI for Gain 18x, 20-bit/400ms).
WFAC is the Window Factor, typically just 1.

As far as I can see, this multifunctional sensor is only able to output the `mw/m^2` UV intensity measurement and doesn't provide the raw 20-bit value or access to see what gain and integration time is set.

So, I was wondering if there's a way to read the original data from the Gravity board.