LG Heatpump integrate MODBUS Commands?

Hi Team, i have a LG MU3R19 in use and in HA with ThinQ integrated.

I see lot of things, but e.g. i cannot power on/off the heater for boiler?
I only have 1 switch to switch auto/cool/heat and this is mainly for floor and not the boiler.
So i checked the “limited” LG MODBUS Description and their i have a possibility to power on/off the DWH.

Does anyone made this, when yes, can you please share how?

thx Berni