receptacle

hi sorry to bother all and changing old receptacle to the usb one it is usb C the new one and the old one i remove watch on youtube how to change the receptacle and i now i understood but then when i got new plug usb C it has 2 earth terminals at the back when old plug socket had one terminal...

I have a working outlet on a finished wall. I’m turning that blank walls space into a faux hearth... building a very shallow (6” deep) framed bump out under a shelf, and installing an electric fireplace/heater insert into that. My issue is that the fireplace connects with a bulky 3-prong plug...