Help ID Squash/pumpkins

OK so I rarely go to Walmart and I never buy food there (still mad they ran my fav grocery store out of business). But tonight I had to pick up my sister's Rx and saw this big box labeled pumpkins. They looked interesting so I bought 3, each one different. Currently cooking the flat orange one. Just wondering if anyone has thoughts as to species/varieties?

for what ot
s wprth the flat orange one was very watery and bland. The green one had a lot more flavor, approaching buttercup but not quite as strong. It was also a little watery. I did realize these have been waxed and that's probably part of the reason they are a little watery, they haven't been able to respire some of their excess fluid off. So the flat orange one and it's seeds went to the chickens. Going to keep some seed fromm the green one. Will be a few edays before I cook the biggest one

They look like maxima squash to me. Cucurbita maxima is a squash species. In the Walmarts I've been in these appeared around Halloween. My parents bought a white maxima for my son somewhere for halloween. Having gotten used to better tasting maximas in recent years with orange flesh like Hidatsa and Loft house I rejected the seed after cutting it open and finding it pallid inside as well as out. That's not to say there aren't some interesting genetics there. Have a fruit stand turban squash in the pie pile (maxima). Planning to save the seeds just for the cool shape.