Comment by tzs
> An example - how long has Matter existed? Yet, it hasn't had a profile for smart plugs with energy monitoring (eg the 12$ IKEA one). Such a basic use case...
That was added with version 1.3 of Matter, released in the middle of this year. You just need to wait for your smart home ecosystem to support it and for IKEA to release a firmware update.
As far as ecosystems go, Home Assistant (HA) fully supports it, as does Samsung SmartThings. Google has a public beta, from what I've read. Amazon and Apple are in the on the way stage.
As far as device goes, all my energy monitoring smart plugs are Tp-link Tapo, and they have been quick to update firmware. I'm using several Tp-Link Tapo P110M Matter smart plugs [1] and a Tapo P316M Matter smart power strip [2] with HA.
The P316M, purchased in the middle of October, came with firmware that supported Matter 1.3 out of the box. I simply added it to HA using the "Add device" button on the HA screen and it worked.
The P110Ms, purchased at the start of this month, came with older firmware so they did not show energy use out of the box in HA. A quick trip to the Tapo app to add them to it during which it checks for and installs the latest firmware, brought them up to the latest firmware. After that the energy monitoring information showed up in HA.