Executive order 13990 - Ended Keystone XL, changed the permitting process for oil and gas drilling to essentially make it economically unviable to perform new oil and gas drilling, placed a moratorium on drilling on federal lands, and eliminates any perceived fossil fuel subsidies [hardly any exist, most subsidies (and they are extensive) go to renewable energy projects].
Executive order 14008
February 26, 2021 - Biden updates the "social cost of greenhouse gas emissions," dramatically altering the way the U.S. government calculates the real-world costs of climate change. The move could reshape a range of consequences, from whether to allow new fossil fuel leasing on federal lands and waters to what sort of steel is used in taxpayer-funded infrastructure projects. The administration plans to boost the figure it will use to assess greenhouse gas pollution's damage inflicts on society to $51 per ton of carbon dioxide – a rate more than seven times higher than that used by former president Donald Trump. But experts say it could reach as high as $125 per ton once the administration conducts a more thorough analysis. This would apply to any new oil and gas lease sale, raising producers’ costs to deliver new supplies.
Basically, Biden has said there will be no new drilling on federal lands, which means that natural gas, oil, and other petroleum products in this country will be limited to existing wells and that no new infrastructure projects will be approved (other than Manchin's Mountain Valley Pipeline which got streamlined as part of the Inflation Reduction Act, more rules for thee and not for me from the left).