Q.Are moonflower seeds white
I bought moonflower vine plants last year and since I live in the North, they will not come back, so there were these little lanterns pods and when I broke them open, a white seed came out. I am hoping it is a seed because these flowers were beautiful.

Yes, those pods were from the moonflower vine plants and the seeds are indeed white. Here is an article that will explain more:
https://www.doityourself.com/stry/collecting-moonflower-seeds-for-next-season
For more information on growing moonflower plants, please visit the following link:
https://www.gardeningknowhow.com/ornamental/vines/moonflower/growing-moonflowers.htm