The federal appeals court has made an exception for this one case against Donald Trump and has revoked his Presidential immunity.
“For the purpose of this criminal case, former President Trump has become citizen Trump, with all of the defenses of any other criminal defendant. But any executive immunity that may have protected him while he served as President no longer protects him against this prosecution.”
All the other Presidents have Presidential Immunity. The court has ruled that only President Trump is stripped of Presidential Immunity. Only Trump.