I think there should be. On some thermostats, the user can create their own presets and name them anything they like (in Cyrillic alphabet if they wish): neither the integration nor HA can know what icon should be applied to them. Allowing to deal with this in the front-end would be very appreciated (and something we kinda expect: selecting an icon and naming an entity are common with most cards).
I thought that’s what you meant here: New Thermostat card preset icons - #2 by piitaya