Debt expiry jan 2023 $800M, total reserves $3,4B. The rest of the debt (future years) is about $17B-20B. The main problem is the debt/gdp which is now about 90%, but unlike the US (debt/gdp at 127%), El Salvador cannot print its main currency (dollars). So that 90% number is not so bad if you are the US, EU, JP or UK, but it's terrible if your currency is weak, or if you have a strong currency but you don't have control over it.

https://tradingeconomics.com/el-salvador/government-debt-to-gdp#:~:text=Government%20Debt%20to%20GDP%20in,of%2036.23%20percent%20in%201998.