For sure, El Salvador, or the creator of chivo bitcoin wallet didn't expect a massive of users. Especially the even of the day that El Salvador is officially using Bitcoin as legal tender.
This is one of the major challenges if you are a software developer, but I believe it will be handle as time goes by, they don't expected a massive user I believe.
What is the Chivo wallet? Is it custodial or non-custodial wallet?
If it is a non-custodial wallet, it is good for El Salvadorians to use it and have keys. Nevertheless, I think if a wallet is created by government, it would be a custodial wallet.
Is Chivo wallet restricted to El Salvadorians or for everyone globally?
Anyone has been able to check the Chivo wallet? Let's share it, please.