Are there dimmable double rocker switches / wired digital room thermostats?

Hello, just a quick question. We have a lot of switches in our living/dining area and therefore a small space problem. That's why we have often planned double rocker switches. In the living and dining area, we of course want to be able to dim the light as well. My question is therefore, are there dimmable double rocker switches?

And then another quick question. Which cable should we install for digital room thermostats for the underfloor heating?

Thanks and best regards

I once googled for series dimmers on the internet, they actually exist.
I was surprised myself.
The second question arises naturally if you know which thermostats and actuators are to be used.

My question is therefore, are there dimmable double rockers?

Sort of. They exist; but none that I know of support LEDs. If you want to dim them, I don't think that will work.

That's why we have 2 Gira uni LED inserts.