When US Presidents die they have a fancy horse drawn hearse and a parade.
The Brits pitched Prince Philip in the back of a pick-up truck for the trip to the cemetery. No joke!
Remember when the Iranians flopped the Ayatollah out of his casket on 5he Street?
Prince Philip specifically planned all details of his own funeral several years ago, including the “pick up truck” as you call it (it has to do with his military service). You can read about it various places online.