To be fair, in the UK (and much of Europe) bronze age remains are everywhere. But there’s only 1 fictional Dobby grave.
Like farmers will regularly dig up a bronze age thingamabob while plowing a field. For example [1], [2]. There’s a story like this every couple of years.
[1] https://www.telegraph.co.uk/news/2025/12/23/farmer-bronze-ag...
[2] https://allthatsinteresting.com/rhubodach-scotland-bronze-ag...
every single entity has (normally) a single (real) burial site. Us grouping many unknowns in one group, and comparing to a single specific one is not quite fair...
there is only one burial site of many other fictional characters including some other well known and beloved ones.
Because beaches are terrible places for graves, one good storm, the beach shifts and you've got to bury them all over again.