Can 1 24v transformer support 2 smart thermostats.
I have run multiple thermostats and even a 24v damper off a single transformer.  Most thermostats are very low draw but to make sure look up the power requirements for each and add them together. Now compare that to the transformer wattage/ amperage. If less is needed from the 2 stats than the transformers rated output you are good to go. If the same or more than the transformers output you can get a larger single or another smaller transformer (usually cheaper) and have 1 for each stat.