Invoice without Imei?

Assuming I buy a mobile phone without a contract in a branch of a discount store and the receipt only says that it is a Huawei P30 and the invoice number with time and date.
In addition to the barcode, the mobile phone packaging also has a Mac address, an IMEI and a serial number.

But the invoice doesn't have this IMEI, Mac and serial number on it.
Were these numbers recorded at the cash desk anyway and can this invoice be assigned to this specific mobile phone?

Or can the retailer use the invoice (without mac, imei, serial number) to assign the exact identity of the cell phone sold to a specific buyer when paying in cash?

Or just that a Huawei P30 was sold with him?

And why exactly do you ask that? Is this supposed to amount to fraud?

No, there are other fundamental reasons.

Which one exactly?

Privacy

I don't think that this violates applicable data protection law in any way. Finally, the unique identification numbers are always noted on guarantee certificates, etc.

Your car dealer also knows, for example, the serial number of your car.

Yes, but if the dealer sells the car without noting the serial number of the car when it is sold, then he would not know to whom he sold the one, for example, Golf.
Do you understand what I'm getting at…