Nibe Heat Pump external RMU temperature

I am just migrating from nibepi to HA and carried out there is no possibility to simulate a RMU module.

Whats an RMU
The RMU is a nibe modbus device with a temperature sensor. This allows to control the heating system based on an actual room temperature.

What is Nibepi doing:
Nibepi is simulating the RMU by using integrated MQTT sensors as a source.

Advantage
Due to seasonal changes some rooms are more warm in spring than in winter. This affects the required heating energy a lot.
E.g.:
My living room in south is the hottest room from ~March to November.
The bathroom in north is very cold in this time. So I forward always the coldest sensor to my Nibe by using the RMU function of nibepi.

Would be nice if this feature can be added. I think it is just some extra modbus register to be added. Thanks.