Unfortunately, I think the IRA is largely to blame for this. Look at which vehicles are not selling and you are likely to see a high correlation with vehicles not eligible for the tax credit. From your article:
Genesis, the Korean luxury brand, managed to sell a mere 18 of its high-end Electrified G80 sedans in 30 days. With 210 units in stock nationwide, that translates to a 350-day supply, according to Cox.
…
Luxury EVs from other manufacturers also faced a similar situation. Models like Audi’s Q4 e-tron and Q8 e-tron, as well as the GMC Hummer EV SUV, had inventories well above 100 days.These vehicles come with hefty price tags that render them ineligible for federal tax credits.
Hawkwin
Who would be driving an EV today if not for the IRA.