According to the filing the 8" tablet runs Android 9.0 Pie on a quad-core Mediatek CPU with 2GB RAM. It has both front and read cameras, 16GB internal storage, a microSD card slot, a single speaker, and a 3.5Ah battery.
There is also FCC paperwork for what is probably Walmart's ten inch tablet, although I have far fewer details to share about it. From what I have gleaned in the photos, I think it will have almost the same specs as the 8" model, only with dual speakers.
I have to say that I was surprised by this move; I wouldn't have thought there would be enough money in budget tablets for it to be worth for Walmart to make the investment. Current budget tablets are so cheaply made that the margins are razor thin. Also, the average build quality is poor enough that the tablets have high failure and discard rates.
While there is money in Walmart letting someone else make these tablets and then selling them, the problems inherent in budget Android tablets make them a risk not worth taking.