I think that half of Bitcoin ETF users have no idea about hard forks and another half probably understands that they won't be able to claim forks.
They will realize it once it hits the media.
Doesn't the ETF of each coin need to be approved?
I don't think so. They won't create "Bitcoin Fork #2987 ETF", they'll just sell Bitcoin Fork #2987. The whole dividend infrastructure is pretty standard for brokers, so it shouldn't be too hard to deal with.
Approval of Bitcoin ETF doesn't mean that its forks like Bitcoin Cash, Bitcoin SV, BitCore, Bitcoin Gold, and others are automatically approved as ETF.
I'm not talking about past forks, I'm talking about future forks. Past forks are irrelevant.
I think that no one has thought about how the claiming of forked coins would work in the crypto ETF world.
I'm pretty sure someone has thought about it, and decided keeping the money is the easiest solution.