It didn't work at first, as simple as it should, but after some search I found how to activate it from powershell and worked perfectly.
Launch a PowerShell as an Administrator
Type dism /online /get-currentedition and press ENTER
Type dism /online /get-targeteditions and press ENTER
Type dism /online /set-edition:serverstandard /productkey:<KEY-KEY-KEY-KEY-KEY> /accepteula and press ENTER

Just Great!! Just follow the guidelines and its activated. Fast !!

what to put in this part? <edition ID> ?
DISM /online /Set-Edition:<edition ID> /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /AcceptEula

please help, thanks

Works as described!
Keep in mind if you just installed server 2022 it will not work until you first restart the server.
Also after you have restarted copy and paste the command in notepad (its easyer) and change what you need to change so you do not leave stuff out or CMD will tell you error on line this and that where your error is!
All in all works flawless no need to be sceptical keys are good!

Instant delivery - soon after buying, Product Key becomes available.

Tested & reported as working.

Good for home lab & training.