We have this at my local grocery store (Meijer) down in the states. You use the grocery store’s app and scan as you go then pay at a kiosk. There’s a scale at the kiosk to weigh produce or I think there’s an app for that too. No need to weigh the whole thing. It’s called “Shop & Scan”.
I have an invite but it’s insanely easy to get into as well. I think open registration is twice a week.