Ethereum Hard Fork. Does this mean all ERC-20 tokens will duplicate? Or just the Ethereum token?

If ethereum goes through a hard fork in july, what happens to all the ERC-20 tokens? Are they going to split in two across both chains as well? Will uniswap get cloned across both blockchains too? I'm just trying to wrap my head around the hard fork

Bitcoin hard forks produced new coins like Bcash and BSV, but these chains didn't have other tokens on their platform (obviously)

What happened with Ethereum Classic, did it have alt coins at the time? If so did they get duplicated across both chains? Thanks for the insight