That reminds me of the Raines sandwich. "Minimum viable sandwich"

https://www.atlasobscura.com/articles/raines-sandwich

So this is "Minimum viable pizza"

Before clicking on this I thought it was going to be about Cuomo's order in this summer that all restaurants offering drinks had to be served with food. I went to at least a couple outside bars that were serving half a piece of white bread with a slice of American cheese on it for your "meal"

They could simply make a single pizza, and then deliver it to themselves N times.

They have to claim that they made something that met the definition of pizza, but with the “buyer”, driver, and store colluding they could just lie.

The first buyer is DoorDash however, and if they somehow want to take vengeance on you after you managed draining their funds in an otherwise perfectly legal way, they might just use the non-fulfillment of their initial purchase contracts as a wedge to take you to court (of course this assumes they somehow learned about that detail of your plan). I don't know if they would have any luck with that, but it's easy to prevent this from happening by actually delivering something that's basically a minimally viable pizza.

Reading through the article again, it is strongly implied that a lot of stores may have a similar arbitrage issue and the DD os getting taken to the cleaners over it. That and I don't think there are any legal issues over this as there were no contracts signed. If anything DD is the one in legal trouble over it.