I'm afraid that, in the fiat world, among officially registered banks or fintechs, every alternative to revolut, will also require KYC. That's the law.

Of course we can use Bitcoin.

But if you want to use fiat, I know no way to use it non KYC-ed. Well, except cash and maybe stablecoins bought peer to peer.

This is probably something closest. But you cannot send stablecoins to a bank account anyway.