You can control hot water on the thermostat, but not via Hubitat.
I've got a dual-channel boiler controller here somewhere, and a spare thermostat. I've just never found the time or inclination to add that hot water control channel to the driver.
BTW, schedules aren't supported directly either. You can set them on the thermostat of course, and switch between modes with Hubitat, but I just use Rule Machine to control things.
