Technology
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It seems pretty poor, especially for 2023. This article from four years ago has TSMC touting an 80% yield rate on their new-at-the-time 5nm process. Still, the fact that Huawei is able to produce 7nm parts at all is something of a victory. Huawei is probably around five years behind TSMC at this point but may be able to close that gap over time.
That's based on TSMC's own test chip not an actual customer's. 17.92 mm² is incredibly tiny when SoCs, CPUs and GPUs range in size from 100 to 600 mm² increasing the proportion of chips with defects as the number of chips on the wafer drops.
From that very article
As TSMC themselves designed the chip, they definitely followed all their design rules for that process to maximize yield. No customer would do that.
Anand explains this in one of his articles.