Is it advisable or say a good practice not to buy a stove circuit breaker and cable when you do not know the full load current of the stove to be connected?

I see they normally supply a stove with a 4mm cable protected by 32A breaker (assuming full load current of the stove to be 32A). I see a new house without a stove circuit, when I ask they said they want to get the stove first to avoid buying a wrong cable and breaker.

Is these a common practice?

Thanks in advance for your comments.