That seems like a feature that the thermostat would need to support. I know that Ecobee makes a big deal of its ability to utilize temperature sensors in other rooms. I don't know whether Honeywell thermostats support that.
As JohnRob said, you can create a virtual thermostat with your bedroom temperature sensor pretty easily. The challenge is to get your HVAC to use that virtual thermostat at night. I am not aware of any physical thermostats that will allow Hubitat to directly command heating or cooling. You can fool a physical thermostat into commanding heating and cooling by manipulating the setpoints.
My HVAC App would enable what you are looking for, but it would require you to put a device like a Zooz ZEN16 or ZEN17 between your existing thermostat and your HVAC equipment. If you would like to do that, send me a PM and I will guide you through the process. The system can be set up in such a way that, if Hubitat or communication with devices fails, the system reverts to working as a single thermostat system.
