There's evidence that deliveries of urns to cemeteries was substantially higher than reported death counts [1], as well as gigantic drops in active subscriber counts in China's telecom providers [2].
I also vehemently disagree "the evidence would be clearly visible". History is littered with genocides on a massive scale that were successfully covered up. We still don't know exactly how many people died in the Holocaust or Holodomor, for example (estimates vary by millions). So this claim that you cannot cover up deaths is clearly false.
It's also very likely the US is over-reporting numbers.
For example, studies have shown US death certificates have "major errors" the majority of the time [3], and several US states have counted unrelated deaths as "COVID" deaths, including Washington State (later partially corrected) [4].
I also disagree with your claim that evidence of China's data manipulation does not count because it's 'six months old', you can't wave away evidence like that.
[1] https://nationalpost.com/news/world/lines-of-urns-in-wuhan-p...
[2] https://www.developingtelecoms.com/telecom-business/operator...
[3] https://www.usatoday.com/story/news/investigations/2020/04/2...
[4] https://www.doh.wa.gov/Portals/1/Documents/1600/coronavirus/...