I'd expect the same. However, reality does not agree. Apparently, the law/rules/whatever state that a death must be reported within 14 days (I have no source for this). I do not know about deaths in general, but for Covid-19 deaths in that Excel sheet on the Arcgis site, the death count takes about 10 days to stabilize. (Why? My guess would be: because public health care in Sweden is managed by the 21(?) regions, each with their on systems for everything.)

Digital does not mean instant. There are plenty of batch systems around that process all changes at a regular schedule. A chain of such subsystems (especially when they're not synchronised) can easily delay feedback by days or weeks.