What exactly is the information you are questioning? It looks like a straightforward illustration of Farr's Law. The epidemic in Sweden essentially has come and gone. People may still be getting infected, as with any flu, but those most vulnerable have essentially already died.
I wish I could find a chart like this for the US as a whole or any state, but I can't. The CDC seemingly no longer reports the weekly deaths from all causes with year-over-year comparisons. Anyway, here is one for France comparing daily deaths in 2018, 2019 and 2020 from 1 March to 15 June. It shows the spike as the epidemic swept through the country, peaking at the end of March. It also shows that since the end of April, deaths are back to normal. Indeed, in some parts of France deaths are below normal, which supports the notion that Covid-19 brought forward many deaths, killing people in March and April who likely would have died in May or June or later this year from their other co-morbidities.
France was hit before the US, so it is further along the epidemic curve. I suspect if we could get reliable data from the US states hit first, notably New York, New Jersey and Connecticut, we might see a similar pattern. There is a chart
here for New Jersey from 2015-2020, but is only through May 2020.