That prediction is based on xG, which Ipswich have consistently outperformed all season long. Either they've been very lucky, or they're doing something that the xG calculation isn't considering.
This site uses shot position, but doesnt take into account defender positions, so a very organised defence can marginally outperform xG, or breaking away can give you slightly better chances than the xG suggests.
You can do more interesting things when you include player tracking, but that data isn't available for the championship.