I might have misunderstood perhaps, but from that thread:
The Reference config from that same release does have an LMT for RGC and the legacy Blue Light Fix.
- !<Look>
name: LMT - ACES 1.3 Reference Gamut Compression
process_space: ACES - ACES2065-1
description: |
LMT (applied in ACES2065-1) to compress scene-referred values from common cameras into the AP1 gamut
ACEStransformID: urn:ampas:aces:transformId:v1.5:LMT.Academy.GamutCompress.a1.3.0
transform: !<BuiltinTransform> {style: ACES-LMT - ACES 1.3 Reference Gamut Compression}