Apps can’t poke at other apps or at most anything outside the sandbox, so your premise of using this app to “find any thing suspicious” probably isn’t going to work.
ssh clients such as this are used to connect to ssh servers, and aren’t all that useful for a port scan, if that’s where you’re headed.
Nor are port scans all that useful, generally.
If you suspect a jailbreak here (as various if those will start up an ssh server), perform a factory reset for low-risk environments as persistence past a reset is reportedly rare, or replace your gear with separately-sourced (or entirely different) gear and different cellular plans and other such, and enable lockdown for higher risk and higher persistence or easily-reintroduced environments.