It's highly likely that NVIDIA have a minimum wafer agreement on 12nm with TSMC that's pretty damned high, due to it being specifically made for them, and also running significantly behind projected consumption due to the crypto GPU demand bust.
So I highly doubt they will be rushing to 7nm as it will cost them more.
To hit volumes, lowering pricing could theoretically help. But I strongly suspect their % margins are majorly down on these new cards, even if nominal margins are slightly up. Those dies are absolutely gigantic, GDDR6 is quite a bit more expensive than GDDR5, and the cards have been plagued with RMAs thus far. Even if prices are lowered, demand won't recover to anywhere near peak 10xx level. So dropping prices enough to make a real difference probably seems pretty undesirable from NVIDIA's point of view.
Also, due to the massive die sizes and high associated costs, IMO as soon as the new mid to high end cards appear for 7nm next year, the 20xx series will immediately be EOL'd, unless 7nm EUV wafer allocation is too low for them, and unlike the 10xx series.