Dollar demand caused by overall usd usage around the world and also caused by latest usd printing - people still pay for things, thus value of money is still there.
Of course it is temporary, but my point is - its not all about oil
If you pay attention, any product from the US must be purchased in dollars. Oil is an example of dollar liquidity. It is the setting up of the Petrodollar that has caused the liquidity and value of the dollar to continuously increase since the oil fields in the Middle East were exploited in the 1970s and 1980s. America gets richer and the dollar is stronger than any other currency.
A loss of dollar liquidity in the oil sector can cause a dollar value collapse.
Right now Russia and America are having an oil war. Currently, the damage belongs to oil companies. Most of those companies are from America.