Just for fun I tried to sign up for the Chivo Wallet today but they are pretty serious about KYC -- they are not screwing around, especially since they are giving away $30 in BTC to all new users. So you have to be a citizen to register for a wallet (makes sense). There is one competing option, not sure if it is available yet, but both work hand-in-hand with the government and won't service non-Salvadorians.