In particular, whatever politicians say, the Republican-controlled House has a rider in the FAA authorization bill which requires airports to continue selling leaded fuel for propeller aircraft forever:
The House version of the bill would require airports that receive federal grants to continue selling the same fuels they sold in 2018 in perpetuity.
While the Democratically-controlled Senate requires a phase-out:
The Senate version would require these airports to continue selling the same fuels they sold in 2022, with a sunset date of 2030 or whenever unleaded fuels are “widely available.”
For context, the FAA approved sale of unleaded fuel for all propeller planes last year, and there are local efforts to ban the sale of leaded fuel in locations where the unleaded fuel is now available
Propeller aircraft are overwhelmingly toys for the rich. Which is why the rightoids are trying to make sure that leaded fuel is always available, so that someone with a lot of money doesn’t have to replace their aircraft engine early.
And no, aircraft engines aren’t some super high-tech special engines, they are just engines that have passed the various tests to be certified, and many of those engines still use 1930s technology. You don’t have to have electronic fuel injection and solid state ignition to run unleaded fuel, you need different valves, and you could easily put better valves in your super special Lycoming engine and be fine on unleaded* gas.
But it costs a rich person money, so no we don’t want to do that.