Hashrate is mainly affected by the price. So any change you see is because of the highly volatile market and the huge market crash that we have had ever since the start of this war (from $70k to $16k).
About a year ago, at $70k we had 22.6 trillion difficulty. Currently, at $16k, we have 36 trillion difficulty. Apparently, hash rate isn't mainly affected by the price.
As we know that in a single country that is possible cause if china holds 50% miners tha 20 to 25% has rate can be dropped for manipulation and that happened in 2020. And that's not just new.
Two things need to be noted here. First, mining in China is illegal (nonetheless, some Chinese still mine), so it doesn't have the same large proportion. Second, the rest of the world isn't China.