Why is there a soup ladle in the mortuary in Jojo Episode 38?
Considering that these tools are not present in the equivalent manga panels I'm going to assume that they're not supposed to be there.

I'm going to say it's a minor animation error and nothing more.

Based on the screenshots you provided I think it's very possible that the background was CGI. The sharp shadows, lack of detail, and flat colors and lighting all seem to support this.
So it's very possible that they simply had a 3D asset that looked about right and used it.