It is absolutely true that a large lithium deposit has been found in Appalachia (in the USA). It's also true, however, that sodium-ion battery chemistry is now beginning to take off (CATL, China) and it requires no lithium.
Even more interestingly, Donut Lab (Latvia, I think) is now shipping its Verge motorcycles with a solid state battery that it claims uses no lithium or "crisis minerals" at all. Which means no cobalt, either.
Thus, the value of lithium may be wildly over-estimated at the moment, given that other promising battery chemistries may render lithium economically obsolete.
Even if the alternative battery chemistries don't achieve the same energy density, they are on target to achieve astonishing economic efficiencies that could result in EV battery packs for vehicles costing 1/5th the current price.
I'll cover this more in my podcasts next week...