A maul is a baby sledge hammer, easier to control than a full size sledge. I used a 4 lb maul to straighten out a worse dent on my 2010 Cobalt front wheel (steel) a week ago. If you can check the back of the wheel for a similar dent. It doesn’t look too bad but keep an eye on the tire pressure and check for the tire sidewall for any bumps/bulges for the next week or too.
A few years back the Missus hit some road debris with her minivan. The steel wheel had a good size dent which I hammered out. The tire looked undamaged but about a week later the sidewall developed a bulge at the impact point. The tire was replaced.