If your pumpkin scones aren’t rising, check your leavening agents to ensure they’re fresh and used in the right amount. Overmixing the dough or using butter that’s not cold enough can also cause dense scones. Additionally, too much moisture from the pumpkin puree may require more flour, and a hot oven (around 400°F) is crucial for a good rise. Lastly, make sure your scones are thick enough before baking to allow for proper lift.