The only other thing that I have used condensed milk for is to make caramel for a caramel tart.

I think the resulting caramel may be the same as Dulce de Leche.

That was before I cut out sugary sweets - as much as possible - from my diet, but that caramel tart was yummy and making the caramel was fairly simple.

Sorry, off topic for pumpkins, although I'm imagining there might be a recipe which combines pumpkin pie and caramel.