The "conventional" way of generating some kind of "artificial gravity" (any kind of force that is perceived as pushing you down on the ground of some space station or whatever) in a science-fiction setting often is huge rotating rings, where the centrifugal force you would experience in a rotating reference frame pushes you away from the point the ring is rotating around, and thus pushing you on the ground of the ring-like structure.
For example in '2001: A Space Odyssey', there also is a station that consists of two huge rings.
I never played Outer Wilds myself, but this wiki article says that "The surface of the platform is made entirely of gravity pads, ensuring that the player does not fall off.". So that would mean, that it's actually the same technology the Nomai used elsewhere.
Which in turn means, I can't actually give you a game-specific answer, only the general, "out-of-universe" answer how a rotating ring would "create" something you would perceive as gravity when standing in the ring with your head pointing inwards and you feet pointing outwards.
The idea of a spinning ring acting as some kind of centrifuge is also illustrated really well in this video by the YouTube channel "Real Engineering".