That's really nice, but in "cases by country", when I select Czechia and then choose "deaths" for data, the country selector reverts to US (and the graph displays the US track) and the country list no longer presents Czechia as an option. AFAIK, there have been deaths in Czechia - if there hadn't been any, then I'd be happy to blame a UI glitch: no record, so no option in country drop-down. That may well be the case, but it might also suggest that the data used are incomplete/out of date.
It is a nice tool and I write this more as a bug* report than anything else :-)
[* er, perhaps bug report is inappropriate in our times. Sorry.]