Try searching this app by keyword. People often talk about mandamus here

you need a lawyer to file that for you

may I ask your reason for a mandamus

case outside time of processing g

It’s a complicated situation. You have to use everything that immigration gives to you to get your case done to think about getting a mandamus. Case inquiry, talking to an agent online. And you need to wait for their reply every time. Also, depending on your lawyer, they might be expensive, since it deals with the Supreme Court.