Dallas sensor filters not working in HA

Hello,
This is my first setup in HA. I just installed a Wemo D1 with ESPHome and a dallas temp sensor.

Everything works well and I can see the temperatur reading in HA in Celcius.

However, I would like to show in in F instead and trying to use the filters/lambda to do so. Here’s the yaml below:

image

When doing this, I still only see the temp in C.

I know the conversion works with the filters/lamda (using the logs), but somehow HA doesn’t pick it up.

Any clue, do I need to setup something else in HA?

Thanks!