Much like you can select F, C, or K for the temperature unit, it would be great to be able to enter an offset to the entity temperature reading. I’ve found the temperature readings can vary widely. I end up creating a template sensor to allow for an offset. This could apply to a variety of sensors (e.g. humidity).
Agree that all my temp sensors are off and require adjustments. As this is often not a fixed figure, the offset functionality should be ‘complex’ alike the esphome option
Calibrate Sensors in ESPHome - danimart1991’s Blog (danielmartingonzalez.com)