The ban affects the entire Eastern Seaboard, the Pacific Coast along California, Oregon and Washington, the eastern Gulf of Mexico and the Northern Bering Sea.
Importantly, the law authorizing this doesn't authorize the president to reverse the ban. Trump has used it before too.
So reversing this likely means an unusual ruling from the courts, or getting congress to change things. Both possible, but take a lot more effort than simply issuing an executive order.
He is relying on an obscure provision of a 1953 law, the Outer Continental Shelf Lands Act, which he says gives him the authority for this executive order.
picked up the pace under Biden, who had approved more permits for oil and gas drilling on public lands by last October than former President Donald Trump had by the same point in his presidency.