Assigning Wattage, Voltage etc. of a power plug to Alexa

I tried to assign wattage, voltage, etc. to an Alexa item to request their value by voice commands…
I successfully missued the TemperatureSensor.temperature, but this is not a very smart solution as it assign the values to temperature in text as well as in category.
I also tried ModeController.mode, but failed.
Any hints?
Thanks Joerg

Can you provide more details such as the item definition you want to expose to Alexa? I assume you just want to request for the item state?

Thanks Jeremy,
sure. Below an example for my microwave:

Switch EG_Kueche_Mikrowelle_Command “Mikrowelle” (gEG_Kueche_Mikrowelle)
String EG_Kueche_Mikrowelle_State “Status Mikrowelle [%s]” {mqtt="<[mosquitto:Haus/OT/WL_SP1_02/tele/STATE:state:JSONPATH($.POWER1)]"}
Number EG_Kueche_Mikrowelle_Power “Verbrauch Mikrowelle [%.1f W]” (gEG_Kueche_Mikrowelle,gOT_Chart_Energy) {mqtt="<[mosquitto:Haus/OT/WL_SP1_02/tele/SENSOR:state:JSONPATH($.ENERGY.Power)]"}
Number EG_Kueche_Mikrowelle_Total “Gesamtverbrauch [%.3f kWh]” (gEG_Kueche_Mikrowelle) {mqtt="<[mosquitto:Haus/OT/WL_SP1_02/tele/SENSOR:state:JSONPATH($.ENERGY.Total)]"}

Thanks. Please make sure to use code fences. Also, can you include the group definition for gEG_Kueche_Mikrowelle and also the state mapping for EG_Kueche_Mikrowelle_State?