They definitely aren't. They're using Chivo which is a centralized custodial wallet solution. Transfers are just updates to their MySQL store - as they should be. Chivo only uses Strike's private LN nodes nobody else is allowed to peer with when facilitating an international transfer -- between two of Maller's own accounts.
Chivo is not crypto. And that's what most folks there are being forced to use by the local dictator. It's centralized, trusted, censorable and entirely antithetical to the Satoshi white paper.
Forbes is reporting[0] that they are using BitGo. FYI Salvadorians are not required to use chivo at all. The interoperability is the exciting part not chivo.
BitGo being another centralized custodial wallet antithetical to the white paper? I mean, my dollars are interoperable with every bank in America and that really doesn't excite me. They're also interoperable with the banks in El Salvador since both use the USD.
Hmm the population of El Salvador is a bit over 6.5 million, which would mean an average of 1 transaction per 100 seconds per person. That seems unlikely.