The Workhorse P32 chassis coaches like yours originally came with helper air bags in the front coil springs, however over the years many people have also upgraded to Super Steer brand (and other), stiffer no air bag front springs to improve the ride. Of course the other possibility is that the airbags failed and someone either removed them or they fell apart, it seems these helper airbags are typically good for around 25,000 miles or so before wearing out. They are fairly easy to replace, and can be done with an hour or so worth of labor.
See this video of a guy doing it https://www.youtube.com/watch?v=tqASXAhrdSE (note it is even easier with a handheld vacuum pump of the type used to vacuum bleed brakes to roll up the airbag.) I had to do this 500 miles from home a couple of years ago, the hardest part is removing the old failed air bag, which it sounds like you no longer have.
p.s. the P32 chassis naturally sits in a way that appears a little nose down, there are specific measurements you can take with spacing to the bump stops to determine if it is sitting at the correct height or not.
