Thank you so much for taking the time to document the Alexa commands!
I also found that if you ask “Alexa, show the temperature at the thermostat” on an Echo Show you get a verbal reply plus a screen with the current setting and up/down arrows appears if you want to use the screen to adjust the temperature. The command “Alexa, show me the thermostat” on the Echo Show gets a response that Alexa does not know how to do that.