>This is not the case of Bitcoin where the introduction of KYC for mining will require a hard-fork.
That's not true, introducing full kyc for transactions only requires 51% of hashrate.
>It doesn't help, also, that the network is being "processed" by a few elites (or pools of wealth) that could be, potentially, identified and made to obey the "government/s".
A direct opposite is true.
PoW is extremely vulnerable to a government takeover. Even in the worst case, buying majority of hashpower requires few billions at most - which is well within the ability of many countries.
More practically, overwhelming majority of mining is done by registered companies in impossible to hide industrial warehouses, making them trivial to regulate and force to do kyc. Total fees are very low on bitcoin now, meaning it's more profitable to mine even empty blocks (due to kyc requirement) in a place with cheap electricity than try to mine with transactions in a place with more expensive electricity. Additionally, America is notorious for trying to enforce its jurisdiction globally, so eg. European miners processing kycless American transaction may find themselves in an American prison. Even if their countries won't extradite them, all it takes is a vacation in a wrong country.
Chinese ban on mining has ironically made miners-enforced kyc a much more likely prospect. Other countries are much more likely to cooperate with America and jointly force miners to enforce kyc.
Contrary to PoW, PoS can function purely anonymously - invisible home nodes instead of big industrial warehouses. External attack by buying enough stake is impossible - there's simply not enough for sale over any realistic periods of time. Regulation is infeasible because legal escape is in theory possible even if only one tiny place in the world remains without forced kyc - there's no need for GWs of power, just some power and internet. Even in countries where it's illegal, hiding a home node is realistic - using tor, vpns and similar, making enforcement very hard.
Hopefully kyc laws on block generation aren't actually enforced as that would significantly impact adoption, however, if they were actually to happen, you are going to see bitcoin miners enforcing kyc while eth2 PoS continues unchanged.