ᐅ Retrofitting or Upgrading to a Digital Thermostat (Cosmo)

Hello everyone,
I have a new build and Cosmo CRTN / CRT24N units were installed.
I would now like to replace them with something modern and digital (possibly WiFi).
Can anyone tell me what I need to consider?
How many amperes does the new digital thermostat require?

Thank you very much.