I understand what you are asking for........but in the home page if a Tado Room is currently heating.......the Room Tile displays the words.....
"Heating To".......isn't that doing the job you are asking for ??🤔
I agree plus these tiles do not scale correctly on the smaller screens found on ‘phones resulting in truncation of the “Set to….and Heating to….” message.
This can easily be solved with the use of the heating icons as suggested and showing the set temperature in, for example, parentheses. 20 (21) similarly you can show if the smart schedule is active or if manual override is active, open window, humidity etc etc. you don’t need words to communicate these data.
Something like this…
Cheers pal @GrayDav4276