It won’t, the so called SmartThings Energy is limited to a handful of devices and requires manufacturers to have some kind of agreement with Samsung. You would expect a Matter 1.3 certified device with energy monitor to automatically appear there, but it doesn’t 
, making the feature less useful if you ask me.
I raised the issue in another post a couple weeks ago since in this case it’s even more weird, the cloud integration is allowed in ST Energy so they already have an agreement in place: