There is no qr code in the lamp. sned message to ike (waiting response)
I’m not familiar with the IKEA products but I do know that every HomeKit supported accessory has an 8 digit code and/or a scannable QR code. Should be somewhere on the accessory itself. Some will also have it in the instruction manual or a separate card enclosed in the box.
There is an exception though. If the accessories were available for purchase prior to getting HomeKit support and later got it with a firmware update, then the code may be generated via software with the manufacturer’s app. An example of this is the LIFX switch.