There’s artificial pumpkin spice flavor used in various products.
That’s why you should read the ingredients for any product that claims “flavored” as it’s a loosely regulated term when it comes to the marketing aspect of a product.
The artificial flavor is proprietary so I couldn’t tell you what they’re comprised of.
Most pumpkin spice products do use real pumpkin spice, but I’ve found a small few that don’t. In particular some weird off-brand candy.