Best way to combine two radiator thermostats?

[dreamy crown]

I'm thinking about how best to control two thermostats simultaneously. Like instead of having to set temp for two climate entities, it would make sense to combine two into one, because they are in the same room and you set the temperature for the room. The Group integration doesn't seem to allow climate entities. But maybe this isn't even the best way to do it? What do you recommend?

[long zenith]

I'd add a label to both thermostats and set the temperature to the label, not the device