No, that's impossible to provide between people dying at home because hospitals are full and the general chaos of those situations. And then there's the big difference between quality of care in various countries, death rates of just about everything will be much higher in Mozambique than they will be in Sweden, it's nonsensical to think that quality of medical care will not have an effect.
> It seems possible that once health care systems are overwhelmed, more people die. But how often, if ever in this pandemic, has that point been reached?
Many times in many countries, look at the national totals somewhere like here (https://covid19info.live/), the trend is nearly always that more cases at once translate to much higher death rates. Partly due to not knowing the true number of infections, but mostly due to the availability of medical care.