I don’t think you can to that. If you override the value of the sensor in HA the information won’t be stent back to the stove.
You can use the entity (number.“stove name”_heating_prower) to control the heat output of the stove. I would use automations or a template to adjust the heating power based on a sensor value. I think a PID controller is the best way to do it (but not the simplest).