Air-water heat pump combined with underfloor heating does not work properly

I just quickly skimmed through the datasheet. There is definitely a heated water buffer and a mixing group installed. Now it depends on the settings... Unfortunately, I couldn't find any user manual or the functions of the Daikin.

So we have a Daikin Altherma 3R ECH2O. So far we have only played with the target room temperature. For me, all rooms are still equally warm, even though I say that one room should not be heated.

Is normal in a thermal envelope

Even if I set via thermostat that no heating should take place in a room? So can I only still play with the volume flow of the individual rooms to regulate something here? I find that very complicated. District heating was more practical.

Work your way into the hydraulic and thermal balancing, then you will know what is possible. Temperature differences between rooms with closed doors are possible within limits.

May seem more practical in the final perception, but ultimately it is a bit like always flooring the gas pedal and controlling the top speed only with the brake. - Inefficient