The inner edge/brink of the plate swirls slightly inwards, starting at the plate’s outer edge and terminating at the inner bottom.

The inner edge/brink of the plate swirls slightly inwards, starting at the plate’s outer edge and terminating at the inner bottom.

Aren’t there pans with this design that let you tip out excess oil or whatever using the swirl?
I doubt that’s what’s going on here though. Just aesthetic IMO.