Indeed if I buy bitcoin in euros and I share them to a wallet in Chile then how does this person in Chile can re-sell the bitcoins in exchange for chilean pesos? because at the end what I would like to do is to have this person in Chile to be able to receive money on a bank account at the end of the process.
it's quite likely that your counterparty in Chile would be able to find someone to trade bitcoin for chilean pesos in cash. Although this may take time.
If you really want to use bank accounts,
https://bisq.network is a fast way to do so without needing to wait for applications (Bisq lets traders use their bank accounts directly without transferring money to a website, it uses escrow agents from the system instead). You could also buy bitcoin from Bisq to send to your counterparty.
Also, if your counterparty chooses, they can simply keep the bitcoin, or find something to spend it on, avoiding the step of converting to pesos altogether.