Gabby's father said that he ordered Domino's pizza for his daughter because she was having connection issues to order food. He said they face timed and he helped her with some technical issus she was having with her social media site Nomadic Statik (I think that is what it is called). He said that no red flags stood out for him during the face time with Gabby.
It sounds like she was busy organizing her social media pages while at the hotel and the father said that he routinely helped out with food, money that Gabby might need, although she didn't ask him for it, he just wanted to help out.
I am sure they interviewed the Domino pizza delivery person to find out who answered the hotel room door when the pizza arrived, and if they saw anyone else there besides Gabby. The father said he didn't use uber eats, he just used the Domino app that he has on his phone and sent the pizza locally to his daughter.
From the podcast by Nancy Grace "Van-Life Girl's "Boyfriend" Named Person of Interest" where she interviews Joseph Petito, Gabby's father.