I've been watching a lot of YouTubes on Chinese rural life and cooking and I've seen a few videos now that use steamed and mashed pumpkin as an ingredient in yeast-raised bread. I haven't tried it yet, but it goes about the same as adding mashed potatoes to a bread recipe. None of the videos I've watched so far have had measurements, but Googling "Chinese pumpkin buns" gave me a good starting point.
Here's one video of buns with a red bean filling and
here's one with plain steamed buns that look like little pumpkins (plus it has two other ways of using pumpkin in the
video, a rice porridge and ribs cooked in the pumpkin itself).
In the same vein, I've tried making tortillas/ gorditas with mashed pumpkin and masa harina with limited success. The dough was a little too moist to press correctly (I use a
pie plate and plastic wrap on the counter since I don't have a press), but when I hand-patted it and fried them they were pretty good, though a bit dry because they were a little too thick. Next time I might add more
water and let the dough hydrate longer, or maybe make it more like a batter and try doing it like a crepe.