You first have to choose switch (1) for the Device, and it could be so that this switch/device only have the power, volt and current integrated in the " Switch " … so choose switch, then 1, and see there if there is power,volt, current integrated ( 10, 39, 40 ) i cant help you with.
But after you set up ALL entities( you want/need/are interested in ), i believe 38 is binary ( on/off ) , for that you choose Binary … and don’t forget to “uncheck” the box (don’t add more …) you have to add all the entities you want, or you have to start over again 
Edit: if you find power, volt, current inside the “Switch” you won’t get separate entities, this was prior added as Attributes on the Switch, as for the other you will get individual entities.
PS: here is how to get the details of your specific device on tuya iot