Bill of Materials should really only be used for things that require a list of items/labor, and aren't sold individually such as a datacenter, a building, a hardware integration project, a wedding, etc. For things that are sold individually, "cost" will suffice, and BoM is an example of incorrectly using a more complicated term for the sake of seeming smart.
As a shorthand for expected retail cost, that is terribly misapplied. Or even for internal cost.
The chip would be one line item on the BOM for the entire thing you plan on shipping (but not packaged yet). Even in the case you are "just" selling a chip, the BOM is likely more complicated,and in this context primarily the manufacturing side cares about that. The COGS (cost of goods sold) is something the company as a whole will care more about - this is what it actually costs you to get it out the door. You will hear "BOM cost" referring to the elemental cost of one item on the BOM, but that's not the BOM itself.
None of these are related to the retail (or wholesale) cost in a simple way, either than forming a floors on long term sustainable price.
The GGG-whatever post is using this sloppily to suggest that the chips are going to be very expensive to produce, therefore the product is going to be expensive.
You'll also see BOM in a materials and labor type invoice, (like when you get your car serviced) but that's not relevant here.
What I really meant was total production cost + reasonable amortization cost for the development/tape out, which is of course is huge even if this chip was mass produced.
The point kinda stands though, this thing is collectively way too hard to fab + assemble to sell to consumers at any reasonable cost, especially on top of the massive R&D AMD, TSMC and everyone along the huge chain put into it.
Its not like a 4090 or Apple Silicon where the production is reasonably cheap, but margins are super high because they can be super high.
Also know as cost of the chip.