No, I am not, and neither is anyone else who otherwise claims to be.
There is no such thing as a certification issued by Ikea to any kitchen installer. It simply doesn’t exist.
“But why do some kitchen installers claim to be certified by Ikea, then?” you may ask. I cannot know for sure, but I would guess that they hope it will bring them more business as you may see them as being better or more trustworthy, which necessarily isn’t the case.