So only for some of their processors? This doesn't seem to have anything to do with their bid to become a foundry.
Interestingly it's just for processors, I would have been down to read about at least a product that 'assures' the supply chain of a broader part of the stack, at least the hardware.
It's just not enough to make me care, I'd probably just rely on the packaging, and vendor procurement, but I guess this is an additional tool.
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the attestation is a real step forward for silicon provenance. the problem is your board, firmware, bmc, and nic still come through the same opaque supply chain as before. the processor is rarely where a hardware implant goes.