Oil prices were already low enough that fracked wells were becoming marginal to operate at best. Then covid shut the economy down, and oil prices dropped off a cliff. Oil companies stopped pumping from expensive fracked wells because they were losing money. Economy came roaring back, because of all the extra federal money thrown at it, but oil companies were reluctant to resume production because it might not last, and they were recouping their previous losses.
Now, with prices what they are, the oil companies are making record profits at the current level of production. Why in the world would they spend the money to bring wells back online, lower prices, and reduce those record profits? The shareholders wouldn't like it much.