Of course he doesn't set gas prices. But when the administration is knowingly hostile to fossil fuels, cancels several expensive projects around fossil fuels, passes bills that encourage use of alternative energies, makes statements around limiting/ending fossil fuels, and refuses to take action to increase the supply of fossil fuels knowing that a war is coming that will spike the prices...
...that will also have a significant impact on the price of oil and gas. If the fossil fuel industries know that the Dems want wind down their business why would then spend millions on developing new energy sources that will only pay off after a 10-15 year investment?
It is absolutely the Biden administrations decisions that are largely responsible for the increase in oil/gas prices that have caused the spike in prices that we are all paying for right now.
