For a coin mined by miners, voting takes place on pools. Each member of the mining pool votes with their hashrate, and then the pool decides whether to support the hard fork or not. Ethereum has 3 large pools that own more than 60% of the hashrate. It is enough to convince these pools, and the rest will be forced to join or mine a new Ethereum classic №2.
If I understand your question correctly, then I will try to give you a simple explanation. Miners are maintenance personnel who receive money for their work. In fact, everything has already been decided and agreed upon, if you, as a miner, think that you can influence the vote, then you are wrong.
Interesting, this brings another question. Who gets to decide which network is
Ethereum and which is
Ethereum classic №2? What happens if supporters/miners/pools/nodes/whatever of both networks want to be recognized as
Ethereum? Will everyone just have to respect the wishes of the stronger/bigger network?