Zemismart is a Tuya whitelabel. Tuya is known for often not playing by the rules; As they do with zigbee, but they do it with Matter as well…
So it’s good to ask for ‘live’ experiences here.
In other words, the risk of any capability not functioning is bigger / the chance on the need for an app to support it, is bigger.
An example of a Tuya Matter plug which doesn’t report power measuring:
