As I stated previously, FAA Aero Nav Services, the FAA entity that develops most FAA RNP AR IAPs, will have nothing to do with third-party developed RNP AR IAPs. No review and no QC.
3rd party design get full review from many different parts of the FAA. I designed and submitted PSP, SCC, and parts of BDL from beginning to end with the FAA.
The 8260 forms are required and reviewed, waivers are reviewed, the procedures are required to be sim checked, obstacle validated, and flight validated.
It AFS 420/460 and AVN that deal with procedure design.
"The Flight Procedures Standards Branch is the principal element of the Flight Technologies and Procedures Division for 14 CFR Part 97, non Part 97 terminal instrument procedures, 14 CFR, Part 95 en route instrument procedures, the administration of the flight procedures and airspace program, and the direction, control, management, and program analysis of all instrument flight procedure standards and criteria development programs."
Flight Procedure Implementation and Oversight Branch-Policies & Guidance