That only represents federal gas tax rates.
There is also a state gas tax.
July 28, 2021
https://i.imgur.com/xurkh4R.jpg
California pumps out the highest state gas tax rate of 66.98 cents per gallon, followed by Illinois (59.56 cpg), Pennsylvania (58.7 cpg), and New Jersey (50.7 cpg). The lowest state gas tax rates can be found in Alaska at 14.98 cents per gallon, followed by Missouri (17.42 cpg) and Mississippi (18.79 cpg).
https://taxfoundation.org/state-gas-tax-rates-2021/
Perhaps Biden cutting the federal gas tax rate will encourage individual states to follow a similar approach with state level gas taxes.
Tax cuts are an extremely rare event to say the least. Once taxes are levied they are almost never cut. It is an extremely generous and rare event for Biden to do this.