Wall Street Journal has an article on page A3 of Tues Aug 3 edition saying the Feds will issue new regs for vehicles of model year 2026.
Required MPG will go up:
average fleet mpg at 55 mph level driving must be above 54.5 MPG
and combined highway/city must be above 36 MPG

Tailpipe emissions will be “tightened” too
but the article does not mention what new NOx per mile level

The former 2016-2020 administration had “loosened” the MPG requirement to 40 MPG at steady 55 MPG and 29 MPG combined.

My estimation is that gasoline powered Toyota Prius type vehicles could meet these new regs.

Electric pickups and large electric SUVs might meet the new regs,
but only because of the “crazy” official math
where they convert range on a battery to an “equivalent” petroleum MPG.