N= 1 but I’ve attended funerals in Australia and Europe and never once encountered the open casket/embalmed body that seems so common on US TV and in movies.
I'm Australian and have been to exactly 1 open casket.
Soap box while I'm here: bodies do NOT need to be embalmed to have a viewing or open casket. If a funeral home is saying it's 'policy' to embalm for a viewing it is 99.9% of the time an internal/company policy and NOT a matter of law. Bodies kept cool without embalming are not stinky, discoloured, or dangerous, or any of the other reasons a funeral home will try to push for embalming. Yes there are exceptions, but they are few and they should all be explained to you in detail and you still have a choice! Prep methods for viewing (to keep eyes and mouth closed) can be done without embalming. You can take the body to a different funeral home at any point, so if you do end up at one refusing a viewing unless they're embalmed you really can go elsewhere. You also don't need a funeral home to have a viewing; you can do it at home as was custom (for ...millenia, I assume) until recently.
Not just TV. I think every funeral I’ve been to here in the US (a dozen? Two dozen?) had an open casket “viewing” before the funeral began. Very common. And I’ve not known anyone to get cremated, but that might just be the circle I run in.
