Because the CFPB is not defending the constitutionality of Section 5491(c)(3) (Dodd-Frank) - https://www.law.cornell.edu/uscode/text/12/5491 - and recommends that the Writ of Certiorari be granted to Seila Law, LCC, CFPB suggests to SCOTUS that the court should consider appointing an amicus curiae to defend the Court of Appeals ruling against Seila Law.