The Power Metering Outlet may work with the patch implemented in the Tuya driver - have you tried it? Make sure you have updated to the latest dev. version of the driver.
The eWeLink seems to have a problem like the other devices from the second group described here.
Please try to make a screenshot (better copy&paste as a text) the information that appears in the 'more info' hyperlink, when you pair the devices as new. You will need to delete them first ( click on "REMOVE DEVICE" button at the bottom right of the device page) and then pair again close to the hub. Save the information from the 'more info' popup window before you continue with naming the device.
