If you think about it there could be 2 degrees difference until TH10/16 switch of or on.
Lets say that you set up
Higher than 19 degrees OFF
Lower than 19 degrees ON
Device will turn on when it reach 18 degrees
Device will turn of when it reach 20 degrees
That is too much deference. One decimal place would be more than enough to solve this problem.
Please do it!
They don't care about that, making it useleess
Change to tasmota firmware. There you can have decimals.
the Ewelink support write to me, that they are evaluating this feature
The sensor can handle decimals, as show on this video