Same in US for actual sales roles, it’s unspoken though. But the retail experience is mostly not actually sales. It’s entirely self service, walk into a warehouse, find what I need, use a kiosk to pay. The humans typically only get spoken to for orientation (they point you in right direction, sometimes) or if doing a return or having some issue with the intended frictionless self serve shopping experience (like a barcode won’t scan). So what you find from a human physique perspective is looks don’t matter at all. They’ll intentionally hire ugly people if they will take less pay, which statistically is the case since data shows good looking people make more.

It's not considered "sales" nor "commission" but I would imagine that hiring attractive people as servers (restaurant waitstaff) who rely on tips is a similar concept.