Have you considered using a simple smartplug to control the AC’s and an external temperature sensor with a compatible smartapp to act as a thermostat?
The downside of this approach is that you won’t get thermostat controls in your list of devices. You can measure the energy consumed from the smartplug. Same with AT, the plug, energy and temp sensors will show up as a separate devices and not an integrated unit.
The upside being that it’s simple and easy to setup with a lot of flexibility like using remote temperatures or multiple sensors and multiple units across multiple rooms to act as a single thermostat or individually for each room.