Under any branding, any manufacturer, internal or external. Key aspect here is it is Apple’s own design, not a (mostly) off the shelf existing GPU.
@StoneGray yes, on the grounds that they are generally commercially available, with established products and designs. Compare with apple silicon; while those use the general arm64 isa, the details of actual chip design are (to my knowledge) proprietary to apple. You can't buy an M1, M2, or M3 chip on the open market, or even really anything derived from a common core with them. Does that clarify enough? I understand the boundaries here are fundamentally a bit fuzzy, and there are some judgment calls involved.
@josharian I’m pretty comfortable on no then, as they’ve invested a lot of $ on the powervr based gpus in M-series processors. Ty for the clarification