Have you noticed that change with COVID? Some places now seem to want you to be further away (sometimes with plexiglass) so some places do more bagging (actually putting the bags in your cart and pushing you a completed cart.) There are some places that seem to have gone the other way and gotten rid of the bagger so you can do your own bagging and placing 6 ft away from the cashier. But pre-COVID it seemed like most places had bags that you pick up at and put in the cart yourself.
Not really COVID related where I live. More or less the smaller the shop, the larger the chance they will bag your groceries. Large ones always have a conveyor belt from which they slide items on the other side where you can pick it up and bag yourself. I think the change mostly came when it has become illegal to give away bags. Since now you have to pay for them, a lot of people bring their own.
