Controlling Multiple thermostats

Hello
Could you please advise me what is the easiest-simplest way to control few thermostat units that I have made using nodemcu with one relay as a switch and temp sensor DHT11 [ESPhome].
At this moment I am able to set only one generic thermostat that lets me control only one room.
How to add another card or climate platform?
Is it possible at all?
Thank you