As others have pointed out, that site generates a risk that isn't what most people think of as the risk of death, that is it gives the risk of catching and then dying of Covid during a 90 day period when Delta wasn't around.

For a more expected assessment of "risk of dying if I have covid", you can use this:

https://www.economist.com/graphic-detail/covid-pandemic-mort...

Although it only shows "<0.1%" for anyone under 40s, so it doesn't break things down that fine (better for hospitalizations).