Medium power, not rapid: the length of stay rules
The average visit to a shopping centre runs to an hour or two. With that window, medium-power charging is what fits: it recovers enough for the customer to notice the service and it allows several points to be installed on the same power as one rapid unit.
Rapid charging in retail makes sense occasionally, one or two bays for whoever is in a hurry, but as the baseline it multiplies the cost without improving the service.