I edited your title to get more detailed responses.
What model Sunova do you have?
There are dozens... hundreds of posts, videos and advice for driving issues and wandering fronts ends on the internet.
The most common first addon to fix this issue is a steering stabilizer. It is like a shock absorber for your steering. Most think this really helps. I put a Roadmaster Steering Stabilier on mine RV and it helped a great deal. The most popular is the SuperSteer. Here's a link to that one: https://supersteerparts.com/
There are a great meany other things to add on as mentioned by Lakejumper above. But probably best to start with the steering stabilizer.
There is also a "Cheap Handling Fix" that is highly rated. Just do a Google search for that.