It looked macabre and like crap. Seems they’d have some kind of throwaway cardboard deal they could dress up a bit instead of that scene.
Funeral homes have display samples/models if they sell coffins so they could a “loaner” available for situations like this.
An accomplished carpenter could have taken 45 minutes and some pine boards (the cheapest around) and made a display unit for $150. The funeral industry wouldn’t be happy over this because there’s no profit.
Years ago, I noted the Amish practice of having a local carpenter just whip out a coffin in a couple of hours for a member of the community who’d passed away in the morning. It’s not rocket science, but simplistic coffins have no profit for the industry.
Rent a coffin. In Mexico they rent a grave.